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Soil samples from three profiles were collected in the areas around Huangqihai by hand drill. The TDS value and chloride concentration of fifty soil water were determined and the basic principle of the calculation of mean chloride concentration, residual flux and chloride cumulative age was introduced. From TDS value and chloride concentration profiles, it is concluded the TDS distribution is almost...
It is generally believed that the karst development, weak geotechnical property and rapid changes in hydrodynamic conditions of groundwater are the main factors to cause karst collapses, while we have insufficient understanding of the hydrochemical actions. Exploitation of groundwater has accelerated the process of partial water cycle, in addition that, water quality environment's changement such...
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...
By means of rainfall simulation, the mechanism of non-point source pollution of organochlorine pesticides (OCPs)by runoff was studied. The results showed that surface runoff perhaps played a more important role than the seepage water in the migration of OCPs from soil to water. The concentrations of OCPs in the runoff decreased with sampling time and then reached stability after 60 minutes. The soil...
The soil water retention curve (SWRC) shows the relationship between soil suction pressure and water content, which is one of the key hydraulic properties to study the flow and solute transports in unsaturated zone. A radial basis function network (RBFN) was developed to describe the SWRC with the observed soil suction pressure and simultaneous soil water content derived from laboratory test with...
To investigate the characteristics of migration and distribution of phenanthrine plays an important role in the control of polynuclear aromatic hydrocarbons (PAHs) contamination. This experiment simulate the migration and distribution of phenanthrine in soil-groundwater by using indoor dynamic soil column test and hydrogeological theories so as to understand the condition and rules of phenanthrine...
In this paper, the author taking the geological problem of environment and occurred geological disasters evaluating objects, apply GIS HAP to evaluate three subsystems of rock environment, environmental soil, water environment which affect the quality of geological environment of Wuhan megalopolis. By analyzing the main factors which affect the subsystems, the author establishes subsystem hierarchy...
Highway runoff is one of the important water resources in urban areas, though severe pollution has curbed its direct use. In this study, a soil infiltration system is proposed for treatment of highway runoff. Bench-scale experiments with different inflow concentrations and system operation modes (continuous/intermittent) have been designed to simulate the highly varied inflow rate and pollution load...
By utilizing TM/ETM+ remote sensing images from 1984 to 2004 as the major data sources, combining with the field survey to get the rule of dynamic process of Beijing wetland ecosystem, this paper systematic analyzed the hydrology, soil, plant condition of the typical wetland area- Widgeon Lake Wetland Natural Reserve in Beijing. And the results are as follows: In recent years, wetland areas were sharply...
The agriculture around Taihu Lake is highly developed, but a large amount of sand and organic matter is directly brought into Taihu Lake from farmland in rainy season and is seriously polluting the water quality of the lake. In order to make a quantitative analysis for the influence of organic matter to the water body of Taihu Lake, the area around Taihu Lake is divided into two land area of paddy...
The paper presents results of studies on ground and surface water pollution from two liquid manure handling objects: a lagoon and a 700 ha area of medium and heavy soils fertilised annually with liquid manure from the pig farm. The studies showed elution of mineral soluble components, mostly nitrates, sodium and potassium, to ground waters. The effect of these objects on water quality was insignificant...
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