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Over exploitation of groundwater resulted in seawater intrusion in coastal aquifer of Shenzhen city, China, during the 1980s and 1990s. In recent years, the improvement of water supply facilities alleviate seawater intrusion, however, it is still of great concern in some local region. A three dimensional density-dependent numerical model using FEFLOW code has been developed to simulate the extent...
The purpose of this paper is to find the variation of pollutant concentration field and its impact on water intake of the Fen River entrance into Yellow River. A 2-D water hydrodynamic and quality model was used to simulate flow and variation of the pollutant concentration field. There will be a backwater in tributaries when the water in Yellow River flow into Fen River. The COD concentration decreased...
The effect of foreign investment on six pollutants such as industrial polluted water, and sulfur dioxide is investigated with the regression model. The result shows that there isn't significantly negative correlation between the FDI and pollution emission, which is contrary to the popular hypothesis so called pollution haven. The environmental effect of FDI notably varies among different regions,...
In recent years, researchers pay increasingly attention on river ecological restoration at home and abroad. According to the practical situation of Tianjin Airport Economic Park river water environment and inter-external experiences, several ecological techniques, such as phytoremediation, artificial aeration and ecological riverbank, were adopted to river ecological restoration. And related operation...
The article analyses and predicts the hydrodynamic feature of study area on the basis of mike21 numerical model. It is by the two dimensions pollution diffused simulation method based on the hydrodynamic model. And then it predicts the contributed concentration field of the waste water. Based on the NH3-N in discharge of sewage, it contrasts the impact on water quality in the Yangtze River of the...
The study on groundwater vulnerability is an effective technical measure for rational development and protection of groundwater resource. In the paper, according to the hydrogeology conditions of the Lincang Basin in Yunnan Province, USEPA's DRASTIC method was applied to evaluate the groundwater vulnerability of this area with the consideration of depth to the water table, Net recharge, aquifer material,...
This study was undertaken in Danjiangkou reservoir and the upper reaches, where the SWAT model was used to analyze the space distribution of non-point source pollution. The land-use pattern was interpreted by Environment for Visualizing Images Software (ENVI). The runoff and the sediment data series from 2001 to 2006 were collected to calibrate the parameters and validate the model. The calculated...
Pollution environment has important influence to soil physical property, however, the method and theory of pollution soil research are not mature. The paper states chemical reaction with pollution solution, inducing dissolve and deposit effect, which is the immanent cause of physical mechanic property of soil. The soil samples of Dalian region have been soaked in sulphuric acid solution and sodium...
In this paper, stormwater runoff from an urban traffic road and building located in Beijing, China, was characterized to measure the stormwater runoff discharge rates and pollutant concentrations. Based on monitoring, the runoff water quality on two underlying surface conditions was analyzed. The temporal dynamics of chemical oxygen demand (COD), NH3-N, NO3-N and total phosphorus (TP) were similar...
Assessment the changes of surface water quality in different times throughout one year is an important aspect for evaluating temporal variation of river pollution due to natural or anthropogenic input of point and non-point sources to water environment that is gradually deteriorating. In this paper, principal component analysis & factor analysis (PCA & FA) is conducted according to the average...
Based on the discharge standards of different industries, this paper determines the evaluation indexes of the status of water pollution in China. According to the discharge data of industrial water pollution of 31 provinces or regions in China, comparing some kinds of comprehensive evaluation methods used commonly for the status of water pollution, including the advantages and disadvantages, it adopts...
Located in the central area of Dali in Yunnan Province, the Erhai Lake Basin is an important agricultural industry base in China with its unique geographical and climate conditions, etc. However, the agricultural structure and land-use patterns in the basin have had some impact on the water environment in Erhai Lake Basin, and soil and water loss and the agricultural area pollution are important factors...
The paper presents the principle and calculation process of the principal component analysis which is a useful method of water quality assessment. Eight indicators include dissolved oxygen, permanganate index, BOD, ammonia nitrogen, copper, zinc, volatile phenol, oil in 20 monitoring sections of Ningbo urban river were analyzed by using principal component analysis. Three factors with 86.67% of accumulated...
For the surficial sediments sampled from the Shaxi River in Sanming, Fujian Province, China, the distribution and fraction of heavy metal zinc in surficial sediments were researched. The microwave digestion result showed that the concentration of zincin surficial sediments ranged from 568 mg/kg to 2126 mg/kg. The results of modified BCR sequential extraction procedure showed that heavy metal zinc...
A pilot-scale experiment with a treating capacity of 10 m3 per day was carried out for swine wastewater treatment by using of a moving bed biofilm reactor (MBBR). The reactor was start-up in 60 days period and run for a year, and an average removal rate of 82.9% for COD and 89.0% for ammonia were achieved, under a hydraulic retention time (HRT) of 12h, with influent COD and ammonia of 1686 ± 497 mg/L...
This paper investigated the spatial-temporal variations and pollution source of surface water quality by analyzing the data from 8 water quality monitoring stations along the middle and lower reaches of the Min River between 2003 and 2008. The results showed that surface water quality was worse in the middle reaches of the Min River than that in the lower reaches and its tributary. Seasonal and spatial...
Based on the contents monitoring of ammonia nitrogen, TN, TP and COD in the sediments, the distribution of pollutants in the sediments along the Yuan River were analyzed. Through the contrast of pollutants contents between water and sediment in the same site, the sources of pollutants in the sediments were studied, from which it can be concluded that the concentrations in the river water are not higher...
Identification of water quality conditions in a river system based on limited observations is an essential task for meeting the goals of environmental management. Various classification methods have been used for water quality estimation. However, a discrepancy frequently arises from the lack of a clear distinction between each water utilization mode, the uncertainty in the quality criteria employed...
Gray correlation analysis and improved IPAT model were used to analyzed industrial environmental impact in Jiangsu, china from 1999 to 2009. Empirical results are : a) all the main industrial pollutants have been controlled, especially the industrial solid wastes, except the total volume of industrial waste gas discharged; b) in spite of the eco-efficiency of industrial waste water grows faster than...
Hohhot area as excessive exploitation of groundwater, the water level declining gradually, if not change this state of irrational exploitation may result in depletion of groundwater resources, groundwater drainage, land subsidence and other serious problems. In this paper, evaluation of the sustainability of groundwater resources in the administrative districts in Hohhot show that south area of Hohhot...
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