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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...
Soil and water loss is an important source of water eutrophication. In this study, soil erosion were measured in the four types of cultivated lands (Paddy land, Terraced farmland, Sloping farmlands <; 25°, and Sloping farmlands ≥ 25°) in Xiaojiang River basin, Chongqing of China. In addition, water qualities were investigated in 5 reaches of Xiaojiang River (Qukou, Yanglu, Gaoyang, Huangshi, and...
The increasing pollution load played a key role in the water quality deterioration and eutrophication of Lake Dianshan. The results of pollution surveys of 1985, 1995 and 2006 showed that the inputs of nitrogen and phosphorus from upper stream origin from Lake Taihu were up to 7565.0 t and 401.0 t in 2006, respectively, accounting for more than 90% of the sum; nitrogen input from non-point source...
The influence of land use on water quality was studied in both buffer zones and watershed. Total nitrogen, total phosphorus and chemical oxygen demand were selected to represent water quality. Alos images and DEM was used to gain the land use map and watershed boundary. Redundancy analysis was used to analyze the relationship of land use to water quality. The results indicated that the land use of...
Twelve samples of surface sediment in Nanhu Lake, Wuhan city were collected and the concentrations of Organic Matter (OM), Total Nitrogen (TN), Total Phosphorus (TP), ammonia nitrogen (NH4+-N) and nitrate nitrogen (NO3--N) were determined; the average result were 6.58%, 3972, 1712, 897 and 20mg/kg separately. Cd, Hg, As, Cu, Pb, Cr and Zn were determined too; and the average value were 0.46, 0.140,...
Characterization of urban stormwater runoff was carried out in commercial, residential and cultural and educational zones during 2009 rainy season in Tianjin. The pH, DO, BOD5, COD, TOC, TSS, TN, TP, NH3-N, As, Pb, Zn, Cd, LAS and fecal coliforms in stormwater runoff were analyzed. The ranges of arithmetic mean concentration of COD, TSS, TN, LAS and fecal coliforms were 67-331 mg/L, 134-480 mg/L,...
Bailianjing River is an important tributary of Huangpu River; 1000 meters upstream its influx to Huangpu River will be set as a landscape river in Expo Site. So the water quality there is of great importance. History reference demonstrated that the river quality was heavily polluted by organic matters and nutrient salts, So the indicators of CODcr, BOD5, NH4+-N, NO3--N, NO2--N, total nitrogen (TN),...
The landscape of reclaimed water always broke out water bloom because of containing high concentrations of nitrogen and phosphorus. The TP and TN of the landscape decreased to 0.04 mg/L and 2.27 mg/L respectively with recycling ozonation at the end of the experiment. Chlorophyll a was 94.3 mg/m3 and CODCr was 45.1 mg/L. Ozonation could inactivate the algae but not destroy the cell completely. Comparing...
Based on the experiment of the phosphorus forms and the effect factors of phosphorus release from sediment in the urban shallow lake (taking Lake Xuanwu as a example), the results showed that when the water body had higher pH value during the excess alga period, phosphorus in the sediment was released deeply and the total dissolved phosphorus (TDP) was increased from 0.049 mg/L to 3.255 mg/L as 66...
A 4-month data set was used to investigate historical changes between the number of the Cyanobacteria and concentrations of total nitrogen (TN), total phosphorus (TP), TN:TP, chemical oxygen dawdling (COD), NO3, pH and Chl-a in a shallow temperate zone lake (Guishui Lake, Beijing, China). The aim was to evaluate changes in the risk of Cyanobacteria blooms, which have occurred several times in the...
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...
Water quality of Darning Lake, located at the central district of Jinan City of China, can be obviously affected by the external nutrients loading. There are about 8.07times107 kg seriously contaminated loosing sediment with 1.30times105 kg phosphorus in the lake sediment. The buffering effect of the sedimentary phosphorus plays a critical role in the lake water quality. Under natural conditions,...
Based on the analysis of the water quality monitoring data of Xingkai Lake in 2008, the eutrophic level of the water body was evaluated through a comprehensive trophic state index method. The results showed that the comprehensive trophic state index (CTSI) was 47.7 for Da Xingkai and 50.1 for Xiao Xingkai, which indicated that Da Xingkai is in a mesotrophic state and Xiao Xingkai in a light eutrophic...
After water storage of Laohutan reservoir, nitrogen (TN), total phosphorus (TP) and ammonia nitrogen (NH3-N) are the main pollutants. In the first month of water collection, the vertical distribution of TN, TP and NH3-N concentrations is increased distinctly from the surface layer to the bottom layer. It shows that the reservoir water quality is affected by pollutants released from submersed soil...
Pollutants release from submerged soil will affect the water quality for a new-built reservoir during the preliminary water storage. The Baohe reservoir is the only one regulating reservoir in the Middle Route of the South-to-North Water Transfer Project (SNWTP). The pollutant release from soil is the important way to impact the water quality of the Baohe reservoir at the beginning of water storage...
Nutrients run-off from land causes environmental problem due to the eutrophication of rivers, lakes or reservoirs. These run-off are considered to affect not only water quality but sea bottom soil status in enclosed bay which has little exchange of sea water to and from outer sea. This study describes estimation of the load of total nitrogen and total phosphorus in Ago bay and its watershed which...
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