Landslide inventory mapping using gis and field investigations on scale 150 000 in tuong duong district, nghe an province master thesis disaster mitigatio

ACKNOWLEDGEMENT I would like to respect Dr Vu Thanh Tu, lecturer in Department of Hydrology and Water Resources, Thuy Loi University and Dr Nguyen Quoc Khanh, a major Researcher of Vietnam Institute of Geosciences and Mineral resources, for their guidance, advice and experience to complete this master thesis Their constructive comments, untiring help, guidance and practical suggestions inspired me to accomplish this work successfully Besides, I would like to thank Propessors in Hydrology and Water resources faculty and members in the Project "Investigation, assessment and warning zonation for landslides in the mountainous regions of Vietnam” conducted by Vietnam Institue of Geosiences and Mineral resources (VIGMR) who supported me in terms of the data collection and gave me useful advices for my thesis I remember all those who have contributed directly or indirectly to successfully completing my study Finally, I must express my very profound gratitude to my family for providing me with unfailing support and continuous encouragement throughout my years of study and through the process of researching and writing this thesis This accomplishment would not have been possible without them Ha Noi, May 23th 2017 Luu Thanh Binh i DECLARATION I hereby declare that is the researches have done by myself under the supervisions of Dr Vu Thanh Tu and Dr Nguyen Quoc Khanh The results and conclusions of the thesis are fidelity, which are not copy from any publish sources or any forms The references documents and relevant sources, the thesis has cited and recorded as prescribed Ha Noi, May 23th 2017 Luu Thanh Binh ii ABSTRACT In Viet Nam, there have not been so far comprehensive database of natural disasters in general as well as landslide in particular Therefore, although there is an undebatable considerable achievements in landslide mitigation, these efficiencyhas not been significant Consequently, there is an urgent demand to have implementation of landslide investigation In the scope of the State-funded Landslide Project “Investigation, assessment and warning zonation for landslides in the mountainous regions of Vietnam” funding by Vietnam institute of geosciences and mineral resources, an integrated methodology that combining the traditional investigation with modern technology of remote sensing imagery analysis has been applied and initially generating encouragingly achievements This methodology has extremely utilized the available data and resources as well as applying stage of the art technology in order to support investigator in field survey Based on that, the most complete landslide database of characteristics along with causes resulting in landslide process has been established Within scope of the topic "Landslide inventory mapping using GIS and field investigations on scale 1:50.000 in Tuong Duong district, Nghe An province" is conducted for further study on an integrated method system between traditional investigations with modern remote sensing technology has been applied and initially given good results This system takes full advantage of available data and resources as well as applies new technologies to assist investigators in carrying out their work in the field Thanks to complete database on characteristics of sliding blocks, as well as its causes has been built iii TABLE OF CONTENTS INTRODUCTION Overview Objectives and tasks CHAPTER LITERATURE REVIEW 1.1 Types of landslides and causes 1.1.1 Common slides 1.1.2 Factors affecting slides 12 1.2 World-wide researches on geological hazards 20 1.3 Researches on geological hazards in Vietnam 23 CHAPTER METHODOLOGY 25 2.1 Process of mapping the current state of landslides 26 2.2 Field surveys 33 CHAPTER DATA COLLECTION AND DATA ANALYSIS 38 3.1 Data collection 38 3.2 Data analysis 39 3.3 Field survey 48 CHAPTER RESULTS AND DISCUSSION 51 4.1 The results of Landslide, interpretation from remote sensing data 51 4.2 Results of actual landslides survey work 54 4.3 The causes of landslides 58 4.3.1 Geomorphology, topography factors 59 4.3.2 Geological factors 59 4.3.3 Meteorological and hydrological elements 60 4.3.4 Causes from the impact of other types of geological hazards 61 4.3.5 Human activities 62 CONCLUSIONS AND RECOMMENDATIONS 64 REFERENCES 65 APPENDIX 68 iv LIST OF TABLES Table Varnas Sliding Classification System (1978, 1984) Table Interpretation standardization of objects corresponding to landslide morphology 31 Table List of map sheet to be used in to created DEM in study area 38 Table Statistics number interpreted locations have signal of landslides on aerial imagery and terrain analysis on digital stereoscopic model at scale of 1: 10.000, and the number of checked sites in the field 53 Table The statistic of landslide points’ number according to scale corresponding type of slope and land use in Tuong Duong district 55 Table The statistic of landslide points’ number according to scale corresponding scale and type of landslide in Tuong Duong district 56 Table The statistic of landslide point’s number causing damage in Tuong Duong district 56 v LIST OF FIGURES Figure Studied area (Tuong Duong district, Nghe An province) Figure Showing different parts of landslide (USGS, 2009) and (Chakraborty, 2008) Figure Falling slide (falling rocks) Figure Upturning slide Figure Rotational slides Figure Translational slides 10 Figure 7.Complex slide 10 Figure Debris flow 12 Figure Flank shape 16 Figure 10 Conceptual framework 27 Figure 11 Stereoscopic for the same area created from aerial image (above) and satellite image (below) with DEM 28 Figure 12 Hill shade 29 Figure 13 a) Checking landslide interpretation in the field; b) Compared landslide interpretation with 3D model 32 Figure 14 Outline of satellite image interpretation processing 40 Figure 15 Crack on road edge and slope 49 Figure 16 Cracks / predicted slopes of sliding blocks in Tan Xa area 50 Figure 17 Comparison of interpretation sliding points with 3D digital model 51 Figure 18 Expected landslide interpreting from remote sensing 52 Figure 19 Landslide type classification by commune administrative unit 54 Figure 20 Landslide frequency by commune administrative unit 55 Figure 21 Landslide volume classification by commune administrative unit 55 Figure 22 Investigated positions in the field 57 Figure 23 Landslide inventory mapping for Tuong Duong district, Nghệ An province 58 vi ABBREVIATION USGS United States Geological Survey GDP Gross Domestic Product FDI Foreign Direct Investment DEM Digital Elevation Model CBDRM Community-Based Disaster Risk Management ADPC Asia Disaster Preparedness Center vii INTRODUCTION Overview Landslide is one of most common types of natural disasters occurring in mountainous areas of Vietnam Damage to people, facilities and environment caused by landslide is often more serious than current awareness and assessment of society In general, studies on landslide have been applied on a large scale, implemented at a small scale, and most of them only provide quantitative forecasting results Up to now, there have been no surveys, studies and warnings about landslide risk in sufficient detail to better serve prevention and mitigation of losses (Le Quoc Hung et al., 2014) In order to overcome these restrictions, it is necessary to develop a comprehensive survey and analysis program that applies advanced and appropriate methodologies to assess and give warnings about landslide effectively and timely for serving planning and management of natural disasters in the context of climate change (Tran Tan Van et al., 2002, Nguyen Xuan Khien et al., 2012, Le Quoc Hung et al., 2013, 2014) So far, Vietnam has not have a full database of natural disasters in general or landslides in particular Therefore, prevention of natural disasters to minimize the damage caused by landslide in recent years has not been effective although there have been many achievements Therefore, investigation of landslide in mountainous areas of Vietnam is a very urgent task Within scope of the topic "Landslide inventory mapping using GIS and field investigations on scale 1:50.000 in Tuong Duong district, Nghe An province" is conducted for further study on an integrated method system between traditional investigations with modern remote sensing technology has been applied and initially given good results This system takes full advantage of available data and resources as well as applies new technologies to assist investigators in carrying out their work in the field Thanks to complete database on characteristics of sliding blocks, as well as its causes has been built Objectives and tasks - To study the application of integrated method system between GIS technology, remote sensing analysis and field survey for setting up landslide mapping - To investigate landslide status, determine causes of landslide in Tuong Duong district, Nghe An province - To make a landslide map at scale 1/50,000 in Tuong Duong district, Nghe An province Features of study area Figure Studied area (Tuong Duong district, Nghe An province) Features of terrain, geomorphology and hydrology Tuong Duong is a mountainous district in western part of Nghe An province with area of 2.812km2 with quite complex terrain, high mountain range and huge segments - It borders Laos and Que Phong district in the north and northwest - It borders Laos in the south and southwest - It borders Con Cuong district in the east and southeast No Survey ID X (m) Y (m) District Commune Geological age weathering zones Landslide type Volume Main causes Main risk Landslide treatment 157 NA-TD.4666 462834 2127131 Tương Dương Yên Thắng O -S sc Heterogeneous weathering zone Complex Moderate Rainfall, Talus cutting, Weathering crust Road Retaining wall 158 NA-TD.4670 463036 2125306 Tương Dương Yên Thắng O -S sc Heterogeneous weathering zone Complex Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 159 NA-TD.4672 462588 2124589 Tương Dương Yên Thắng O -S sc Heterogeneous weathering zone Rotational slide Large Rainfall, Talus cutting, Weathering crust Road Nothing 160 NA-TD.4681 465336 2120650 Tương Dương Tam Quang O -S sc Heterogeneous weathering zone Complex Large Rainfall, Talus cutting, Weathering crust Road Retaining wall 161 NA-TD.4683 464836 2120706 Tương Dương Tam Quang Nkb Heterogeneous weathering zone Complex Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 162 NA-TD.4684 464733 2120911 Tương Dương Tam Quang Nkb Heterogeneous weathering zone Rotational slide Rất Large Rainfall, Talus cutting, Weathering crust Road Nothing 163 NA-TD.4685 464585 2121110 Tương Dương Tam Quang Nkb Heterogeneous weathering zone Lateral spread Large Rainfall, Talus cutting, Weathering crust Road Nothing 164 NA-TD.4688 464075 2122470 Tương Dương Tam Quang O -S sc Heterogeneous weathering zone Rotational slide Large Rainfall, Talus cutting, Weathering crust Road Retaining wall 165 NA-TD.4689 464059 2122842 Tương Dương Tam Quang O -S sc Heterogeneous weathering zone Lateral spread Large Rainfall, Talus cutting, Weathering crust Road Retaining wall 166 NA-TD.4690 464471 2123015 Tương Dương Tam Quang O -S sc Heterogeneous weathering zone Lateral spread Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 88 No Survey ID X (m) Y (m) District Commune Geological age weathering zones Landslide type Volume Main causes Main risk Landslide treatment 167 NA-TD.4691 464811 2123301 Tương Dương Tam Quang O -S sc Heterogeneous weathering zone Lateral spread Minor Rainfall, Talus cutting, Weathering crust Road Nothing 168 NA-TD.4694 464226 2124244 Tương Dương Tam Đình O -S sc Heterogeneous weathering zone Complex Large Rainfall, Talus cutting, Weathering crust Road Nothing 169 NA-TD.4695 463988 2124181 Tương Dương Tam Đình O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 170 NA-TD.4696 463846 2124237 Tương Dương Tam Đình O -S sc Heterogeneous weathering zone Rotational slide Large Rainfall, Talus cutting, Weathering crust Road Nothing 171 NA-TD.4704 464533 2120441 Tương Dương Tam Quang Nkb Heterogeneous weathering zone Lateral spread Minor Rainfall, Talus cutting, Weathering crust Road Nothing 172 NA-TD.4752 442459 2118620 Tương Dương Tam Hợp S -D hn Heterogeneous weathering zone Fall Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 173 NA-TD.5001 456734 2136345 Tương Dương Yên Na S -D hn Heterogeneous weathering zone Rotational slide Large Rainfall, Talus cutting, Weathering crust Road Tilting down 174 NA-TD.5002 457069 2137122 Tương Dương Yên Tĩnh S -D hn Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 175 NA-TD.5003 457025 2137770 Tương Dương Yên Tĩnh S -D hn Heterogeneous weathering zone Flow Large Rainfall, Talus cutting, Weathering crust Road Nothing 176 NA.BTB.5006 457921 2138840 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 89 No Survey ID X (m) Y (m) District Commune Geological age weathering zones Landslide type Volume Main causes Main risk Landslide treatment 177 NA-TD.5007 457975 2138885 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Lateral spread Minor Rainfall, Talus cutting, Weathering crust Road Nothing 178 NA-TD.5014 460128 2139766 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Fall Minor Rainfall, Talus cutting, Weathering crust Road Nothing 179 NA-TD.5015 460170 2140007 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 180 NA-TD.5016 460375 2140290 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Flow Minor Rainfall, Talus cutting, Weathering crust Bare soil Nothing 181 NA-TD.5017 460451 2140560 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Flow Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 182 NA-TD.5023 462614 2142583 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 183 NA-TD.5027 463686 2143698 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Large Rainfall, Talus cutting, Weathering crust Road Nothing 184 NA-TD.5029 464630 2143659 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 185 NA-TD.5030 465187 2143649 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 186 NA-TD.5036 459335 2139660 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 90 No Survey ID X (m) Y (m) District Commune Geological age weathering zones Landslide type Volume Main causes Main risk Landslide treatment 187 NA-TD.5041 459325 2141265 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 188 NA-TD.5047 458295 2143362 Tương Dương Kim Tiến O -S sc Heterogeneous weathering zone Rotational slide Large Rainfall, Talus cutting, Weathering crust Bare soil Nothing 189 NA-TD.5051 455398 2138813 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Bare soil Nothing 190 NA-TD.5053 454750 2139230 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Flow Moderate Rainfall, Talus cutting, Weathering crust Bare soil Nothing 191 NA-TD.5055 454275 2139165 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Large Rainfall, Talus cutting, Weathering crust Bare soil Nothing 192 NA-TD.5067 460760 2141039 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Retaining wall 193 NA-TD.5074 459537 2140047 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Flow Minor Rainfall, Talus cutting, Weathering crust Bare soil Nothing 194 NA-TD.5076 459533 2139171 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Bare soil Nothing 195 NA-TD.5079 458689 2139525 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 196 NA-TD.5083 465305 2144313 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Bare soil Nothing 91 No Survey ID X (m) Y (m) District Commune Geological age weathering zones Landslide type Volume Main causes Main risk Landslide treatment 197 NA-TD.5107 443691 2144508 Tương Dương Kim Đa O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Tilting down 198 NA-TD.5117 437220 2142056 Tương Dương Lưỡng Minh O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 199 NA-TD.5119 436937 2141021 Tương Dương Lưỡng Minh O -S sc Heterogeneous weathering zone Flow Minor Rainfall, Talus cutting, Weathering crust Road Nothing 200 NA-TD.5121 437031 2140474 Tương Dương Lưỡng Minh O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 201 NA-TD.5122 436952 2140295 Tương Dương Lưỡng Minh O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road 202 NA-TD.5124 443128 2138474 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Fall Moderate Rainfall, Talus cutting, Weathering crust Bare soil Nothing 203 NA-TD.5128 445732 2138296 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Rotational slide Large Rainfall, Talus cutting, Weathering crust Road Tilting down 204 NA-TD.5129 445936 2138280 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 205 NA-TD.5130 445139 2138388 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Rotational slide Large Rainfall, Talus cutting, Weathering crust Road Nothing 206 NA-TD.5303 467895 2144513 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Complex Moderate Rainfall, Talus cutting, Weathering crust Road Undergroun d water drainage 92 No Survey ID X (m) Y (m) District Commune Geological age weathering zones Landslide type Volume Main causes Main risk Landslide treatment 207 NA-TD.5304 468225 2145155 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 208 NA-TD.5306 469726 2145844 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 209 NA-TD.5307 470273 2145887 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Complex Minor Rainfall, Talus cutting, Weathering crust Road Nothing 210 NA-TD.5312 470721 2146806 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 211 NA-TD.5315 470835 2147155 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 212 NA-TD.5316 470895 2147480 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 213 NA-TD.5318 470971 2148350 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Large Rainfall, Talus cutting, Weathering crust Road Nothing 214 NA-TD.5319 470867 2148676 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 215 NA-TD.5323 470497 2145928 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 216 NA-TD.5324 469968 2145879 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Large Rainfall, Talus cutting, Weathering crust Road Nothing 93 No Survey ID X (m) Y (m) District Commune Geological age weathering zones Landslide type Volume Main causes Main risk Landslide treatment 217 NA-TD.5325 469500 2145655 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Complex Large Rainfall, Talus cutting, Weathering crust Road Tilting down 218 NA-TD.5329 468216 2144863 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 219 NA-TD.5331 467624 2144105 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 220 NA-TD.5336 456578 2135155 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 221 NA-TD.5347 452540 2136696 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 222 NA-TD.5348 451799 2137099 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 223 NA-TD.5350 450895 2136978 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 224 NA-TD.5356 449767 2137164 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 225 NA-TD.5369 446472 2137203 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 226 NA-TD.5371 446350 2137596 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Tilting down 94 No Survey ID X (m) Y (m) District Commune Geological age weathering zones Landslide type Volume Main causes Main risk Landslide treatment 227 NA-TD.5373 444886 2137655 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 228 NA-TD.5374 444897 2137440 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Complex Minor Rainfall, Talus cutting, Weathering crust Road Nothing 229 NA-TD.5376 445086 2136897 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Complex Large Rainfall, Talus cutting, Weathering crust Road Nothing 230 NA-TD.5377 444598 2136842 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 231 NA-TD.5379 443813 2136656 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Rotational slide Large Rainfall, Talus cutting, Weathering crust Road Tilting down 232 NA-TD.5381 443681 2136274 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 233 NA-TD.5382 443460 2135603 Tương Dương Xá Lượng O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 234 NA-TD.5383 443059 2134995 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 235 NA-TD.5384 442548 2134704 Tương Dương Xá Lượng O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 236 NA-TD.5385 442454 2134181 Tương Dương Thạch Giám O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 95 No Survey ID X (m) Y (m) District Commune Geological age weathering zones Landslide type Volume Main causes Main risk Landslide treatment 237 NA-TD.5387 445632 2137799 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Cut off 238 NA-TD.5388 446984 2137151 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Complex Minor Rainfall, Talus cutting, Weathering crust Road Tilting down 239 NA-TD.5389 452031 2136977 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 240 NA-TD.5390 466055 2118843 Tương Dương Tam Quang Nkb Heterogeneous weathering zone Complex Large Rainfall, Talus cutting, Weathering crust Road Nothing 241 NA-TD.5394 464076 2118649 Tương Dương Tam Quang S -D hn Heterogeneous weathering zone Complex Minor Rainfall, Talus cutting, Weathering crust Road Nothing 242 NA-TD.5396 463225 2119083 Tương Dương Tam Quang S -D hn Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 243 NA-TD.5398 462850 2119957 Tương Dương Tam Quang Nkb Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 244 NA-TD.5401 461311 2120137 Tương Dương Tam Quang Nkb Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 245 NA-TD.5407 467131 2117302 Tương Dương Tam Quang S -D hn Heterogeneous weathering zone Complex Large Rainfall, Talus cutting, Weathering crust Road Tilting down 246 NA-TD.5408 467609 2117038 Tương Dương Tam Quang S -D hn Heterogeneous weathering zone Complex Minor Rainfall, Talus cutting, Weathering crust Road 96 No Survey ID X (m) Y (m) District Commune Geological age weathering zones Landslide type Volume Main causes Main risk Landslide treatment 247 NA-TD.5410 468422 2116805 Tương Dương Tam Quang S -D hn Heterogeneous weathering zone Complex Minor Rainfall, Talus cutting, Weathering crust Road Nothing 248 NA-TD.5413 469607 2115987 Tương Dương Tam Quang S -D hn Heterogeneous weathering zone Complex Large Rainfall, Talus cutting, Weathering crust Road Nothing 249 NA-TD.5603 466372 2134407 Tương Dương Yên Hoà O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 250 NA-TD.5605 467041 2135495 Tương Dương Yên Hoà O -S sc Heterogeneous weathering zone Rotational slide Large Rainfall, Talus cutting, Weathering crust Road Nothing 251 NA-TD.5606 467585 2135590 Tương Dương Yên Hoà O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 252 NA-TD.5615 479541 2135989 Tương Dương Nga My O -S sc Heterogeneous weathering zone Rotational slide Moderate Rainfall, Talus cutting, Weathering crust Road Nothing 253 NA-TD.5622 477471 2139065 Tương Dương Nga My O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall, Talus cutting, Weathering crust Road Nothing 254 NA-TD.5628 475874 2141750 Tương Dương Nga My O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall; Địa hình; Weathering crust Bare soil Nothing 255 NA-TD.5633 476805 2133112 Tương Dương Nga My O -S sc Heterogeneous weathering zone Rotational slide Minor Rainfall; Địa hình; Weathering crust Bare soil Nothing 256 NA-TD.5655 464452 2154113 Tương Dương Hữu Khuông T ađt Heterogeneous weathering zone Rotational slide Minor Rainfall; Talus cutting; Weathering crust Road Nothing 97 No Survey ID X (m) Y (m) District Commune Geological age weathering zones Landslide type Volume Main causes Main risk Landslide treatment 257 NA-TD.5664 465535 2151247 Tương Dương Hữu Khuông S -D hn Heterogeneous weathering zone Complex Minor Rainfall; Địa hình; Weathering crust Bare soil Nothing 258 NA-TD.5716 478101 2126965 Tương Dương Nga My T ađt Heterogeneous weathering zone Complex Minor Rainfall; Talus cutting; Weathering crust Road Nothing 259 NA-TD.5717 478524 2126952 Tương Dương Nga My T ađt Heterogeneous weathering zone Complex Minor Rainfall; Talus cutting; Weathering crust Road Nothing 260 NA-TD.5719 479828 2126783 Tương Dương Nga My T ađt Heterogeneous weathering zone Complex Minor Rainfall; Talus cutting; Weathering crust Road Nothing 261 NA-TD.5720 480689 2126905 Tương Dương Nga My T ađt Heterogeneous weathering zone Complex Moderate Rainfall; Địa hình; Weathering crust Bare soil Nothing 262 NA-TD.5721 482418 2125826 Tương Dương Nga My T ađt Heterogeneous weathering zone Complex Minor Rainfall; Địa hình; Weathering crust Road Nothing 263 NA-TD.5801 439088 439088 Tương Dương Xã Lượng O -S sc Heterogeneous weathering zone Complex Moderate Rainfall; Địa hình; Weathering crust Bare soil Nothing 264 NA-TD.5803 438487 2131987 Tương Dương Xá Lượng O -S sc Heterogeneous weathering zone Complex Moderate Rainfall; Địa hình; Weathering crust Bare soil Nothing 265 NA-TD.5805 437891 2132224 Tương Dương Xá Lượng O -S sc Heterogeneous weathering zone Complex Minor Rainfall; Địa hình; Weathering crust Road Nothing 266 NA-TD.5809 440565 2137244 Tương Dương Lưỡng Minh O -S sc Heterogeneous weathering zone Complex Enormou s Rainfall; Địa hình; Weathering crust Bare soil Nothing 98 No Survey ID X (m) Y (m) District Commune Geological age weathering zones Landslide type Volume Main causes Main risk Landslide treatment 267 NA-TD.5810 439772 2137704 Tương Dương Lưỡng Minh O -S sc Heterogeneous weathering zone Complex Minor Rainfall; Talus cutting; Weathering crust Road Nothing 268 NA-TD.5814 437715 2138612 Tương Dương Lưỡng Minh O -S sc Heterogeneous weathering zone Complex Moderate Rainfall; Địa hình; Weathering crust Bare soil Nothing 269 NA-TD.5816 436915 2138632 Tương Dương Lưỡng Minh O -S sc Heterogeneous weathering zone Complex Moderate Rainfall; Talus cutting; Weathering crust Road Nothing Lưỡng Minh O -S sc Heterogeneous weathering zone Complex Moderate Rainfall; Talus cutting; Weathering crust Đất rừng tự nhiên Nothing 270 NA-TD.5817 437997 2138759 Tương Dương 271 NA-TD.5823 435945 2140299 Tương Dương Lưỡng Minh O -S sc Heterogeneous weathering zone Complex Large Rainfall; Talus cutting; Weathering crust Road Nothing 272 NA-TD.5824 435778 2140367 Tương Dương Lưỡng Minh O -S sc Heterogeneous weathering zone Complex Minor Rainfall; Talus cutting; Weathering crust Road Nothing 273 NA-TD.5825 435479 2140248 Tương Dương Lưỡng Minh O -S sc Heterogeneous weathering zone Complex Large Rainfall; Địa hình; Weathering crust Bare soil Nothing 274 NA-TD.5826 435444 2140422 Tương Dương Lưỡng Minh O -S sc Heterogeneous weathering zone Complex Large Rainfall; Địa hình; Weathering crust Road Nothing 275 NA-TD.5829 434461 2140507 Tương Dương Lưỡng Minh O -S sc Heterogeneous weathering zone Complex Large Rainfall; Talus cutting; Weathering crust Road Retaining wall 276 NA-TD.5830 436693 2140151 Tương Dương Lưỡng Minh O -S sc Heterogeneous weathering zone Complex Moderate Rainfall; Talus cutting; Weathering crust Road Nothing 99 No Survey ID X (m) Y (m) District Commune Geological age weathering zones Landslide type Volume Main causes Main risk Landslide treatment 277 NA-TD.5831 436914 2140190 Tương Dương Lưỡng Minh O -S sc Heterogeneous weathering zone Complex Minor Rainfall; Talus cutting; Weathering crust Road Nothing 278 NA-TD.5832 440369 2132836 Tương Dương Xá Lượng O -S sc Heterogeneous weathering zone Complex Moderate Rainfall; Talus cutting; Weathering crust Road Nothing 279 NA-TD.5833 440571 2132792 Tương Dương Thạch Giám O -S sc Heterogeneous weathering zone Complex Large Rainfall; Talus cutting; Weathering crust Road Nothing 280 NA-TD.5834 440908 2132720 Tương Dương Thạch Giám O -S sc Heterogeneous weathering zone Complex Moderate Rainfall; Talus cutting; Weathering crust Road Nothing 281 NA-TD.5835 441164 2132837 Tương Dương Thạch Giám O -S sc Heterogeneous weathering zone Complex Moderate Rainfall; Talus cutting; Weathering crust Road Nothing 282 NA-TD.5836 441405 2132871 Tương Dương Thạch Giám O -S sc Heterogeneous weathering zone Complex Moderate Rainfall; Talus cutting; Weathering crust Road Nothing 283 NA-TD.5837 441798 2133018 Tương Dương Thạch Giám O -S sc Heterogeneous weathering zone Complex Moderate Rainfall; Talus cutting; Weathering crust Road Nothing 284 NA-TD.5838 442444 2133577 Tương Dương Thạch Giám O -S sc Heterogeneous weathering zone Complex Minor Rainfall; Talus cutting; Weathering crust Road Nothing 285 NA-TD.5843 445086 2136888 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Complex Moderate Rainfall; Talus cutting; Weathering crust Road Tilting down 286 NA-TD.5844 444600 2136842 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Complex Minor Rainfall; Talus cutting; Weathering crust Road Tilting down 100 No Survey ID X (m) Y (m) District Commune Geological age weathering zones Landslide type Volume Main causes Main risk 287 NA-TD.5845 443787 2136651 Tương Dương Yên Na O -S sc Heterogeneous weathering zone Complex Large Rainfall; Talus cutting; Weathering crust Road 288 NA-TD.5846 443675 2136277 Tương Dương Xá Lượng O -S sc Heterogeneous weathering zone Complex Large Rainfall; Talus cutting; Weathering crust Road Tilting down 289 NA-TD.5847 443456 2135610 Tương Dương Xã Lượng O -S sc Heterogeneous weathering zone Complex Moderate Rainfall; Talus cutting; Weathering crust Road Nothing 290 NA-TD.5848 443056 2134992 Tương Dương Xá Lượng O -S sc Heterogeneous weathering zone Complex Moderate Rainfall; Talus cutting; Weathering crust Road Tilting down 291 NA-TD.5849 442588 2133631 Tương Dương Thạch Giám O -S sc Heterogeneous weathering zone Complex Moderate Rainfall; Talus cutting; Weathering crust Road Tilting down 292 NA-TD.5850 441071 2132540 Tương Dương Thạch Giám O -S sc Heterogeneous weathering zone Complex Minor Rainfall; Talus cutting; Weathering crust Road Tilting down 293 NA-TD.5858 430742 2130372 Tương Dương Lưu Kiền GDi,GaT npb Heterogeneous weathering zone Complex Minor Rainfall; Talus cutting; Weathering crust Road Tilting down 294 NA.BTB.5859 428117 2128951 Tương Dương Lưu Kiền GDi,GaT npb Heterogeneous weathering zone Complex Minor Rainfall; Talus cutting; Weathering crust Road Nothing 295 NA-TD.5868 434645 2116824 Tương Dương Tam Hợp O -S sc Heterogeneous weathering zone Complex Moderate Rainfall; Talus cutting; Weathering crust Road Nothing 296 NA-TD.5869 433912 2115812 Tương Dương Tam Hợp O -S sc Heterogeneous weathering zone Complex Large Rainfall; Talus cutting; Weathering crust Road Nothing 101 Landslide treatment No Survey ID X (m) Y (m) District Commune Geological age weathering zones Landslide type Volume Main causes Main risk Landslide treatment 297 NA-TD.5870 433361 2115186 Tương Dương Tam Hợp O -S sc Heterogeneous weathering zone Complex Moderate Rainfall; Talus cutting; Weathering crust Road Nothing 298 NA-TD.5871 432614 2114096 Tương Dương Tam Hợp O -S sc Heterogeneous weathering zone Complex Minor Rainfall; Talus cutting; Weathering crust Road Nothing 299 NA-TD.5872 432156 2113545 Tương Dương Tam Hợp O -S sc Heterogeneous weathering zone Complex Minor Rainfall; Talus cutting; Weathering crust Road Nothing 300 NA-TD.5873 431917 2112604 Tương Dương Tam Hợp O -S sc Heterogeneous weathering zone Complex Moderate Rainfall; Talus cutting; Weathering crust Road Nothing 301 NA-TD.5874 431636 2111075 Tương Dương Tam Hợp O -S sc Heterogeneous weathering zone Complex Large Rainfall; Talus cutting; Weathering crust Road Nothing 302 NA-TD.5875 431545 2110073 Tương Dương Tam Hợp O -S sc Heterogeneous weathering zone Complex Moderate Rainfall; Talus cutting; Weathering crust Road Nothing 303 NATD.5019/1 461168 2141151 Tương Dương Yên Tĩnh O -S sc Heterogeneous weathering zone Flow Large Rainfall, Talus cutting, Weathering crust Road Cut off 102 ... Within scope of the topic "Landslide inventory mapping using GIS and field investigations on scale 1:50 .000 in Tuong Duong district, Nghe An province" is conducted for further study on an integrated... between GIS technology, remote sensing analysis and field survey for setting up landslide mapping - To investigate landslide status, determine causes of landslide in Tuong Duong district, Nghe An province. .. of landslide points’ number according to scale corresponding scale and type of landslide in Tuong Duong district 56 Table The statistic of landslide point’s number causing damage in Tuong