nitrate pollution of groundwater in the salinas valley of california

... includes the 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, in Vinh Yen, in Hai Phong, in Nam Dinh and in ... factor causing pollution, especially in the centre of the well fields The lowering of the water level causes an increase in the velocity of groundwater flow, and increasing percolation of water Table ... 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 vicinity - Assessment of...

Ngày tải lên: 15/03/2014, 23:49

... Marine formations, such as the Great Valley Sequence and the Lower Princeton Submarine Valley Fill deposits, labeled in red in Figure 3, are the primary saline water aquifer systems in the northern ... Williams into the Southern Sacramento Valley VALUE OF UNDERSTANDING THE AQUIFER SYSTEMS The hydrogeology illustrated in Figure is complex, involving both saline and freshwater aquifer systems These ... and finer grained silts and clays formed from volcanic mud flows and yields various rates of groundwater Along the eastern margin of the valley, well yields in the Upper Tuscan are low Moving...

Ngày tải lên: 11/06/2016, 01:01

... wet weather condition These results indicate the range of variation in the quality of surface runoff which makes urban surface runoff quality control more difficult Besides washoff from the surface, ... after the sewerage system, by the streets in downtown Hanoi or due to the malfunctioning and overflowing of the septic systems Although individual households might contribute only minor amounts of ... an indicator of mixing wastewater with runoff water Fig shows the correlation of EC with T-N, NH4+-N, E.coli and TC, in which the correlation of EC with T-N and NH4+-N is higher than that of the...

Ngày tải lên: 05/09/2013, 10:15

... Protection in Areas of the Far North and Marine Areas Adjacent to the Northern Coast of the USSR22 (Environmental Edict) in its Article specified: In the marine areas adjacent to the northern coast of the ... the Council of Ministers of the USSR, June 1990, ‘On Measures of Securing the Implementation of the Edict of the Presidium of the USSR Supreme Soviet of 26 November 1984 “On Intensifying Nature ... Navigation and pollution in the Northern Sea Route 233 might well open the way for full application of the OPA in the EEZ of the USA The USA claims that the environmental provisions of the LOS Convention...

Ngày tải lên: 01/11/2013, 09:20

... radiation The extent of the effect of its presence on the radiation spectrum, together with the resolution and signal-to-noise of the instrument, determine the accuracy of the measurement In the UV, ... the knowledge of these sources and removal processes by means of inverse modelling techniques Also the quality of the satellite retrievals is a point of concern Presently the uncertainty of the ... is the final result of a study on the applicability of remote sensing in the field of air pollution requested by the DG Environment The objectives of this study were to: • Have an assessment of...

Ngày tải lên: 17/02/2014, 10:20

... sent to the laboratory for analysis During the winter the samples in all the individual collectors had to be transported to the laboratory for thawing, weighing and bulking Maintenance of to the ... were established at the beginning of June 2004 For logistical reasons the plot in Russia was established at the beginning of October 2004 The equipment for collecting the rain and snow samples ... Betula–Empetrum–Cladonia Pinus–Vaccinium vitis-idaea X Pinus–Vaccinium vitis-idaea Pinus–Cladonia Pinus–Vaccinium vitis-idaea Pinus–Vaccinium vitis-idaea Pinus–Cladonia Pinus–Vaccinium vitis-idaea Pinus–Vaccinium...

Ngày tải lên: 17/02/2014, 22:20

... of detail additional information This also hindered an in- depth analysis of the results Hence, the findings from the qualitative portion of the study might be considered preliminary Page 10 of ... within the country [5] To the best of our knowledge, there is no reliable information on the prevalence, incidence or community's perception and knowledge of the disease in the region As part of ... from the two study areas reflected the common views of the discussants were selected, translated into English The accuracy of the translation was checked by re-translating into Amharic and then into...

Ngày tải lên: 06/03/2014, 04:20

... Master of A r t s T i t l e of Thesis r A Investigation i n t o Attitudes n Towards Water Pollution i n the Shuswap Lake Area of B r i t i s h Columbia Examining C omrnittee : Chairman: E J Hickin ... i t s of t h e 71 residents 29.0pinions concerning t h e s e r i o u s n e s s of water p o l l u ti0ninB.C 73 30.0pinion concerning Shuswap Lake water q u a l i t y 73 31.0pinion concerning f ... 45 Age of t h e sample 46 Location of t h o s e interviewed Occupation of t h e sample 46 Education of t h e sample 47 Income of t h e sample 48 Importance of water...

Ngày tải lên: 15/03/2014, 16:20

... $235,000 (midpoint of $132,000) 6.3 Results Table 6.3.1 present estimates of the health costs of air pollution in the GMR, using PM10 as the single indicator of the health effects of air pollution ... Where COI includes the cost of measures to limit pain, then some cost of pain and suffering is factored into the cost estimate According to the US EPA (2000), no application of the cost -of- illness ... cost of pain and suffering can be many times the cost of treatment The information in this report has been developed to provide a better understanding of the costs of air pollution This information...

Ngày tải lên: 15/03/2014, 16:20

... 1990 The effects of marine pollution on fisheries in the inner Gulf of Thailand In: Oceanography and Marine Pollution: An ASEAN EC Perspective Proceeding of the ASEAN-EC Seminar/Workshop on Marine ... evident that the increasingly deteriorating conditions in the marine environment of the inner Gulf of Thailand have threatened the existence of several economically important organisms in the area ... Jringjit, K., 1987a Heavy metals in seawater and sediments of the eastern coast of the Inner Gulf of Thailand In: Proceedings the 5th Seminar on Research in Water Quality and Quality of Living...

Ngày tải lên: 15/03/2014, 23:20

... coarse grain size [4, 5]. Fine sediments composed  mainly of sand in the lower part and weathered  clay in the upper part of Vinh Phuc Formation  (Q13vp). The thickness of this layer varies from  1 m to 55.7 m. The thickness of coarse sediments  ... and Bac Ninh provinces [4].  3. Conclusions  On  the basis  of frequency  distribution,  the main characteristics of quantitative distribution  of chemical components of groundwater in the Red River Delta are indicated as following:  ... by  total  mineral  degree  and  displayed  in Table 4. In this table, the second and third (2,  3) columns refer to the mean of concentration of main  ions  in rainy  season  of Pleistocene ...

Ngày tải lên: 22/03/2014, 12:20

... 5%, the final decision taken during the last Santorini Workshop was to replace these days by using the average of the value of the pollutant of the previous day (to the one with the missing value) ... Timeliness The delays in the different steps of the production of the information depend on the availability of the required data in each centre and in the European agencies These delays have been investigated ... type of users of compiled information • Methods of dissemination to these users • Time spent with the following tasks: a) maintaining the system, 2) analysing and 3) preparing and disseminating...

Ngày tải lên: 23/03/2014, 00:20

... Assessing the air pollution benefits of further climate measures in the EU up to 2020 for Service Contract for carrying out cost-benefit analysis of air quality related issues, in particular in the ... changes in air pollution concentrations The changes in concentration levels (relative to the baseline) were then input into the CAFE cost-benefits model; using concentration-response functions, the ... shown in monetary equivalent in the following tables Total estimates of annual damage are given in Table Incremental benefits arising from the changes in CO2 price are shown in Table Results at the...

Ngày tải lên: 23/03/2014, 00:20

... variable for the determinants of pollution anywhere upstream of point u Our empirical models are then left with the simpler task of explaining the change in pollution from the upstream point to the downstream ... (and pollution) to allow at each point within her jurisdiction by trading off the utility of consumption against the welfare cost of the pollution downstream, but subject to the constraint that pollution ... over the spending in the larger county that they were a part of in the previous year For the average county in Brazil, this translates into a 20% increase in expenditures Thus the story of water...

Ngày tải lên: 29/03/2014, 14:20

... discussions in the course of finalising the studies and provided valuable inputs to the ideas presented in the Final Chapter.1 The UE Project held two workshops to discuss the progress of the case ... economies of scale, development of supporting infrastructure, marketing, and penetration of the existing fleet.6 Heywood and The Air Pollution in the Megacities of Asia (APMA) project was initiated in ... environment in Asian cities The last chapter summarises the findings of the studies and discusses the barriers and opportunities of the air pollution control in the transportation sector, concluding...

Ngày tải lên: 29/03/2014, 14:20

... improvements in the long term instead of special interests in the short term and guide the public into realizing the importance of protecting the environment D Private Ownership of the Capped Trading ... handle the increasingly serious situation of acid rain and SO2, the law institutes “two zones,” the acid rain controlling zone and the SO2 controlling zone These two zones are established in the ... parameters, including monitoring and enforcement Pollution sources included in the two-phase program benefit from the freedom of finding the pollution reduction method that is the best value to them...

Ngày tải lên: 29/03/2014, 18:20

... quarrying and mining activities There are many other industries concentrated in the Kigali industrial area that discharge all their liquid wastes into the Ruganwa River The UTEXRWA textile industry ... effluent into the Rwanzekuma River 2.2 Location of Sampling Points A total of 22 sampling sites (Fig 2) were selected for the monitoring of pollution trends in the Nyabugogo Catchment The rationale ... Results Data analysis involved the assessment of the variation of pollutants at each sampling point according to dry season and rainy season and the assessment of the variation of pollution with distance...

Ngày tải lên: 29/03/2014, 21:20

... until there is proof of fracturing contaminants in surface waters [13] Congress acted to protect drinking water in the Safe Drinking Water Act of 1976 with protection through the implementation of ... fracturing involves injecting specially engineered fluids consisting of chemicals and granular material into the wells at incredible pressure to break up the fuel stores and stimulate the flow of ... additional oversight to fracturing activities involving chemicals being injected into the ground In addition, requiring mandatory reporting of chemicals used in hydraulic fracturing would allow first...

Ngày tải lên: 29/03/2014, 21:20

... number of valves for the six dominant species) showed the major influence of sampling date and the minor influence of substrate type Different treatments explained, on aver- age, less than 2% of the ... type of farming activity in the surrounding watershed We evaluated this hy- pothesis by examining the colonisation of ceramic sub- strates incubated in 29 streams and rivers in southern Que´bec, ... related to the intensity and type of agriculture, indicating the greater importance of local farming practices The use of periphyton as a bioindicator provides an integrated measurement of water...

Ngày tải lên: 28/07/2014, 17:21

... exceeded in 40% of samples in the area of the Pass while in the area of NFR 40 except the area of Jablunkov Pass in 20% of samples (Fig 1) High contents are found in the uppermost mineral horizon in ... Content of lead (median) (mg/kg) in soil profiles of spruce (left) and beech (right) stands Zinc The contents of zinc are higher in the area of Jablunkov Pass than in the remaining area of NFR ... 0.05) in the uppermost mineral horizon in the profile (Tables and 3) In the case of zinc, lead and cadmium we found higher contents in soils in the area of the Pass This is confirmed by the highest...

Ngày tải lên: 07/08/2014, 10:21