Báo cáo " Characteristics of Quaternary sedimentary facies in relation to water bearing capacity of aquifers and aquicludes in the Red River Delta, Vietnam " ppt

... VNUJournal of Science,EarthSciences23(2007)170‐176 170 Characteristics of Quaternary sedimentary facies  in relation to water bearing capacity of aquifers  and aquicludes in the Red River Delta, Vietnam NguyenThanhLan*,TranNghi,DangMai,DinhXuanThanh College of Science,VNU Received07March2007 Abstract.There ... m. However,due to the action of old river system...

Ngày tải lên: 28/03/2014, 15:20

... average thickness of about 13.6 m, while the depth to the top and to the bottom of groundwatertable variesfrom5m to 10m and from15m to 20m respectively[4]. Chemical compositions and some characteristics ... widely in RRD. It composes of two layers characterized by a fine grain size and coarsegrainsize[4,5].Finesedimentscompos ed mainly of s...

Ngày tải lên: 22/03/2014, 12:20

... rice fields and flood plains. Some of them learn to swim at early age, but others were not trained. There is no official swimming training in the school program in the Mekong River Delta. ... deaths of children from drowning. In peak flow periods, all children (over 160,000) in the high inundated areas are not attending their schools. The beginning and the e...

Ngày tải lên: 18/10/2013, 12:15

... Fig.1: The Mekong River Basin and Land forms of the MD in Vietnam The main objective of this article is the presentation of the forest wetland inventory process, applied to both the inland and ... to October, most of the MD receives between 1800 and 2200 mm of rainfall. At the end of the rainy season, due to the combination of floodwater...

Ngày tải lên: 09/12/2013, 22:15

... overview of the drinking water supply situation 1 in the Mekong river delta, Vietnam (Le Anh Tuan) AN OVERVIEW OF THE DRINKING WATER SUPPLY SITUATION IN THE MEKONG RIVER DELTA, VIETNAM ... collecting, storing and treating the water for domestic use. • Rain water: is used as one of favorite drinking water sources, special in the rural and...

Ngày tải lên: 20/12/2013, 19:15

... in Vietnam. The Delta in Vietnam is bordered to the North by Cambodia, to the west by the Vam Co river, to the south by the Eastern Sea and to the west by the Gulf of Thailand. The whole Delta ... the river branches is very complicated. The main factors are river discharge, local rainfall and runoff, the amplitude of tides in the East...

Ngày tải lên: 09/12/2013, 22:15

... around 85% of the total water supply. Approximately 2 million tons of rice, produced in the MD, are yearly exported from Vietnam to the rest of the world. The rapid expansion of intensified ... to irrigate nearly 1,5 million hectares of cultivable lands in the dry season. The shortage of freshwater leads to increasing salinity intrusion throughout...

Ngày tải lên: 16/01/2014, 17:20

... methods to mitigate arsenic in groundwater. - Investigation into the degree of arsenic pollution and the scale of distribution of arsenic in the vulnerable areas in the Red River Delta plain and ... lowering of the water table and the enlarging of the cone of depression. The observed data show that cones of depression have formed in Hanoi,...

Ngày tải lên: 15/03/2014, 23:49

... f s and u 2 as a function of depth. The change in the amplitude of the saw-tooth depends on the arrangement of the soil layers and the mixed levels of sand, silt and clay soils. If the thickness ... of floodwater, causing overland flows along the banks and interior fields. Flood basins are low- lying areas and received these sedimentary materials...

Ngày tải lên: 22/03/2014, 12:20

... Red River Delta, Cuu Long River Delta, Central plain in Quaternary Red River Delta(RRD) and CuuLong River Delta(CLRD)are the biggestplains in Vietnam.  Developing history and sedimentary ... eolian sediment in sandybars and sandydunes in CLRD. 4.Thermoluminescenceage of red sandycycles in PhanThiet‐BinhThuanprovinces The coastline of South Central Vi...

Ngày tải lên: 22/03/2014, 12:20