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Remote Sensing (RS) was integrated with Geographical Information System (GIS) technique in this study to explore the spatiotemporal change of urban built-up land and linkage between percentage of urban built-up and chemical Permanganate index (CODMn), Ammonia (NH4+-N), total phosphorus (TP) concentrations in the Jiulong River Basin, Southeast China over the period 1986–2007. Percentage of urban built-up...
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...
As the main portion of urban catchment, road is also a major non-point pollution source of receiving water body. The road runoff pollution has attracted wide attention. The paper makes a study on six rainfall road runoff from 3 different types of roads, analyses the status of road runoff pollution, the surface runoff pollution load and correlation between road runoff pollutants. The result shows that...
Based on the introduction of hydrogeology situation and the natural environment in Changbai Mountain area and mineral contents of 8 spring waters, the water abundance, the water quality, the healthy effect on human body, mineral type and characteristics of these spring waters were evaluated. Furthermore, the taste indices of these spring waters are superior. As compared with the well-known European...
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...
Aiming at the fact that the hydrochemistry environment of shallow groundwater becomes worse and worse in the past ten years in LuoYang. On the basis of large amounts of test and observation datum, the paper analyze the cause form the lithology of aquifer, the recharge, discharge of groundwater and human engineer activity and make the following conclusion: the purification capacity on many contaminations...
The watershed Landscape characteristics are important variables that influence surface water quality. Freshwater research and management efforts could be greatly enhanced by a better understanding the relationship between these variables and surface water quality. The major focus of this paper involved modeling relationships between watershed characteristics variables and water quality indicators...
Wetland is an important regulator of water quality, which has great potential for purifying water pollutants. This paper proposes two methods to estimate water quality purification capacity: the single-factor water quality purification rate and the comprehensive water quality purification rate. It takes the area, from Long'an Bridge to Zhaosanliangzi which lies at the end of Zhongyin main channel...
It applies hydrodynamic Model to simulate COD of sewage around Xiaoyangkou, Rudong City, Jiangsu Province in this paper. Curvilinear orthogonal grid is used in interesting area, and hydrodynamics and water quality model are used to the current velocity field and tidal level field both on case of the spring and the neap tide. The computational results are compared with measured field data around drain...
Surface water quality is negatively influenced by the urbanization process to pollutant loads in stormwater runoff and increases in runoff peaks and volumes. The first flush effect is the main impetus for pollutants transportations. This study compared the characteristics of first flush effect on stormwater runoff from blacktop driveway, concrete roof, and roof with grassland. The first flush effects...
This paper explores and identifies the rules of the unsteady evolution of NH3-N pollution in the upper and middle reaches of Minjiang River through multi-scale analysis on the weekly NH3-N pollution data for the last five years provided by the water quality monitoring station, Minjiang River Bridge, Leshan City, Sichuan Province. The results of wavelet analysis indicate that the NH3-N pollution index...
This paper presents a numerical method to simulate the 2D tidal flow and water quality under the orthogonal curvilinear coordinates. In order to overcome the computational difficulties in natural rivers, such as the complicated boundary figures, the great disparity between length and width of computational domain, etc., orthogonal boundary-fitted grid is used, the irregular domain in physical plane...
As a result of the large risk associated with the contamination of aquifers, it becomes imperative to protect groundwater supply areas. One of the practical methods that is projected for the protection of aquifers is to zone a boundary around current production in order to control hazardous industrial practices close to the wells supply. Nanping Highway is proposed to be constructed over a mineral...
The aquatic environment is a complicated system with uncertainty. The study of uncertainty in water quality modeling can improve peoplepsilas understanding of the nature of the aquatic environment and it is important to the development of water quality modeling. The typology and sources of uncertainty is represented to improve the understanding and characterizing of the uncertainty in water quality...
Urban non-point source (NPS) pollution of Suzhou City in different land use was investigated from Nov. 2006 to Sep. 2008 in this paper. The results show that pollutants concentrations were very variable and dispersed for different sampling sites. The median values of Event Mean Concentrations (EMC) of COD, SS, NH3-N, TN and TP were 119-225, 93-188, 2.30-11.77, 6.35-19.56 and 0.8-2.7 mg/L, varied in...
On the basis of analysis of ash-water from Baoding power plant, chemical components of underground water and the condition of environmental hydrology the prediction on pollution from ash-water permeation was carried out by applying one- dimensional homogeneous mathematical model. The results show that ash-water will not take bad influence on the water quality of water source of Baoding city to ash-field...
This paper sets up precipitation runoff and pollutant yield models in plain drainnage area to translate temporal and spatial distribution of rainfall, infiltration and evaporation into temporal and spatial distribution of net rainfall within the drainage. Given flow throughput and polygonal feature of river channel that leads to realization of runoff spatial distribution, it adopts Virtual Flow Confluence...
Evaluation of water environment quality plays an important role in environment science. By analyzing the factors influencing multi-reach water quality, a RBF neural network model with water quality is developed using neural network theory and method. It is integrated into a software package using VB program. The software has a friend interactive interface, and someone not knowing artificial neural...
Wetlands in urban are important part of environment. The state of wetland is tightly related with the security and sustainable development of ecosystem and society. This study is about wetland investigation in park of Jinan city which having been famous for its springs based on high spatial resolution remote sensing QUICKBIRD data. Through study, we conclude that :(1) the vegetation structure is reasonable;...
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