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Ecological Remediation Measures for non-point source pollution Based on source-Sink Landscape Theory: A Case Study of Huanghou Basin

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Journal of Landscape Research 2024年第2期16卷 72-76页

作者： WANG Hao XIAO Shizhen School of Karst Science Guizhou Normal University/State Engineering Technology Institute for Karst Desertification ControlGuiyangGuizhou 550001China

The growth of society and population has led to a range of water pollution *** these,non-point source pollution assessment and treatment pose a particular challenge due to its formation *** has become a focal point and challenge in water pollution treatment *** study area for this research was the Huanghou basin in Guizhou Province,southwest *** land use type of the basin was analyzed using remote sensing technology,and water quality data was collected by distributing points throughout the basin,based on source-sink landscape *** distribution map of the basin’s source-sink landscape and the results of water quality data accurately and efficiently identified the areas with high risk of non-point source pollution in the western and southwestern residential and agricultural areas of the upper ***,a strategy of“increasing sinks and decreasing sources”was *** strategy was implemented at both macro and micro levels to address non-point source pollution in the basin using ecological remediation *** work to control karst rocky desertification should continue at a macro *** rocky desertification area in the basin should gradually transform into grassland and forested land,while increasing the overall area of the sink *** restoration techniques,such as slope planting,riparian zone vegetation restoration,increasing plant abundance,and restoring aquatic plants,can effectively control non-point source pollution at the micro *** to traditional control methods,this remediation strategy focuses on source and process *** is more effective and does not require large-scale water pollution control projects,which can save a lot of environmental control funds and management ***,it has greater research significance and application value.

关键词： source-sink landscape theory non-point source pollution Ecological restoration Rocky desertification control Karst basin

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Quantification of Effects of Natural Geographical Factors and Land-scape Patterns on non-point source pollution in Watershed Based on Geodetector:Burhatong River Basin,Northeast China as An Example

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Chinese Geographical Science 2022年第4期32卷 707-723页

作者： SHI Jinhao JIN Ri ZHU Weihong School of Geography and Ocean Sciences Yanbian UniversityHunchunChina Key Laboratory of Wetland Ecological Functions and Ecological Security HunchunChina

Changes in natural geographic features and landscape patterns directly influence the hydrology and non-point source pollution processes in the watershed;however,to slow down non-point source pollution,it is necessary to distinguish their *** the non-point source pollution process is interactional as a result of multiple factors,and the collinearity between multiple independent variables limits our ability of reason ***,taking the Burhatong River Basin,Northeast China as an example,the methods of hydrological simulation,geographic detectors,and redundancy analysis have been combined to determine the impact of natural geographic features and landscape patterns on non-point source pollution in the *** Soil&Water Assessment Tool(SWAT)has been adopted to simulate the spatial and temporal distribution characteristics of total nitrogen and total phosphorus in the *** results show that the proportions of agricultural land and forest area and the location-weighted landscape contrast index(LWLI)are the main indicators influencing the rivers total nitrogen and total *** interaction of these indicators with natural geographic features and landscape configuration indicators also significantly influences the changes in total nitrogen(TN)and total phosphorus(TP).Natural geographical features and landscape patterns have different comprehensive effects on non-point source pollution in the dry and wet *** and TP loads are affected mainly by the change in landscape pattern,especially in the wet *** the ecological restoration program has improved forest coverage,the purification effect of increased forest coverage on the water quality in the watershed may be offset by the negative impact of increased forest *** high concentration and complexity of farmland patches increase the risk of non-point source pollution spread to a certain extent.

关键词： Soil&Water Assessment Tool(SWAT)model Geodetector non-point source pollution impact factors redundancy ana-lysis

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DITCHES AND PONDS CAN BE THE sourceS OR SINKS OF non-point source pollution:OBSERVATIONS IN AN UPLAND AREA IN THE JINGLINXI CATCHMENT,CHINA

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Frontiers of Agricultural Science and Engineering 2023年第4期10卷 607-626页

作者： Yiwen WANG Lei CHEN Kaihang ZHU Chenxi GUO Yu PU ZhenyaoSHEN State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing 100875China.

As the common features of agroecosystems,ditches and ponds benefit the irrigation and drainage,as well as intercepting non-point source ***,most ditch-pond studies have been conducted in lowland *** test this source-sink assumption in upland areas,this study made observations on the ecological function of the ditch and pond system in a typical catchment in ***,the changes in ponds in the catchment were analyzed using high-resolution remote sensing ***,the migration of agricultural pollutants in ditches and ponds were analyzed by field sampling and laboratory *** results showed that over the past 15 years the length of ditches in the catchment and the number of small ponds(sources and sinks for agricultural ***,the contributing factors were explored and it was found that ditches and ponds are important sinks in dry ***,during the rainy season,ditches and ponds become sources of pollutants,with the rapid drainage of ditches and the overflow of ponds in upland *** results of this study revealed that the ditches and ponds could be used for ecological engineering in upland catchments to balance drainage and intercept pollutants.

关键词： ditches ponds non-point source pollution mountainous areas nitrogen phosphorus

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Reducing non-point source pollution with enhancing infiltration

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Journal of Environmental Sciences 2006年第1期18卷 115-119页

作者： MU Huan-zhen ZHENG Tao HUANG Yan-chu ZHANG Chun-ping LIU Chen Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

The rainfall system was set up on a slope land, which was used with some materials to enhance soil infiltration. The results showed that it was effective to enhance the infiltration of rainwater in soil and reduce the pollutants of surface runoff. After the soil meliorated by the lignin polymer and zeolite, runoff was delayed about 10 min and reduced by 44.40%--50.00%, synchronously, the pollutant loads, such as total suspended solids （TSS）, chemical oxygen demand by ditromate （CODCr）, total nitroger （TN） and total phosphorus （TP）, were reduced on averages by 44.58%, 37.80%, 51.62% and 44.11%, respectively. It is an available technique to control the pollution of non-point source from sources.

关键词： runoff enhancing infiltration lignin polymer non-point source pollution

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A distributed non-point source pollution model: calibration and validation in the Yellow River Basin

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Journal of Environmental Sciences 2004年第4期16卷 646-650页

作者： HAOFang-hua ZHANGXue-song YANGZhi-feng InstituteofEnvironmentalSciences BeijingNormalUniversityBeijing100875China

The applicability of a non-point source pollution model—SWAT(soil and water assessment tools) in a large river basin with high sediment runoff modulus(770 t/km2 in the Yellow River) was examined. The basic database, which includes DEM, soil and landuse map, weather data, and land management data, was established for the study area using GIS. A two-stage “Brute Force' optimization method was used to calibrate the parameters with the observed monthly flow and sediment data from 1992 to 1997. In the process of calibration automated digital filter technique was used to separate direct runoff and base flow. The direct runoff was firstly calibrated, and the base flow, then the total runoff was matched. The sediment yield was calibrated to match well. Keeping input parameters set during the calibration process unchanged, the model was validated with 1998—1999's observed monthly flow and sediment. The evaluation coefficients for simulated and observed flow and sediment showed that SWAT was successfully applied in the study area: relative error was within 20%, coefficient of determination and Nash-Suttcliffe simulation efficiency were all equal to or above 0.70 during calibration and validation period.

关键词： Yellow River SWAT sediment flow non-point source pollution

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Geo-cognitive computing method for identifying“source-sink”landscape patterns of river basin non-point source pollution

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International Journal of Agricultural and Biological Engineering 2017年第5期10卷 55-68页

作者： Zhang Xin Cui Jintian Liu Yuqi Wang Lei State Key Laboratory of Remote Sensing Science Institute of Remote Sensing and Digital EarthChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Sanya Research Center Institute of Remote Sensing and Digital EarthChinese Academy of SciencesSanya 572029Hainan ProvinceChina

The aim of this study was to quantitatively evaluate the influences of landscape composition and spatial structure on the transmission process of non-point source pollutants in different *** location-weighted landscape contrast index,using the hydrological response unit(HRULCI)as the minimum research unit,was proposed in this *** the description of the endemic landscape types and various geographical factors in the basin,the index calculation can reflect the impact of the“source-sink”landscape structure on the non-point source pollution in different regions and quantitatively evaluate the contribution of different landscape types and geographical factors to non-point source *** study constructed a method of geo-cognitive computing for identifying“source-sink”landscape patterns of river basin non-point source pollution at two levels.1)The basin level:the spatial distribution and landscape combination of the entire basin are identified,and the crucial“source”and“sink”landscape types are obtained to measure the differences in the non-point source pollutant transmission processes between the“source”and“sink”landscapes in the different watersheds.2)The landscape level:HRULCI is calculated based on multiple geographical correction weighting *** using the idea of intersecting geographic information system(GIS)and landscape ecology,the landscape spatial pattern and ecological processes are *** with the traditional method for studying landscape patterns,the calculation of HRULCI makes the proposed method more ecologically ***,a case study was evaluated to verify the significance of the proposed research method by taking the Yanshi River basin,a sub-basin belonging to the Jiulong River basin located in Fujian Province,China,as the experimental study *** results showed that this method can reflect the spatial distribution characteristics of the“source-sink”types and their relationship with non-point source pol

关键词： non-point source pollution “source-sink”landscape pattern remote sensing hydrological response unit quantitative calculation

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Method for calculating non-point source pollution distribution in plain rivers

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Water Science and Engineering 2011年第1期4卷 83-91页

作者： Long-xi HAN Fei HUO Juan SUN State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University Nanjing 210098 P. R. China Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of Education Hohai University Nanjing 210098 P. R. China College of Environmental Science and Engineering Hohai University Nanjing 210098 P. R. China

The land area in a river network is divided into certain-scale square cells for the sake of precision, and, based on the physical mechanisms of rainfall-runoff processes and runoff pollution, the non-point source pollution from cells is estimated using the export coefficients of different land use types. The non-point source pollution from a land cell should all go into the closest fiver reach, so it is distributed according to the terrain of the plain river network area and the positions of land cells and river network reaches. A relationship between a single land cell and its pollution-receiving reach can be determined using this system. In view of the above, a spatial distribution model of the rainfall runoff and non-point source pollution in reaches of a plain river network area was established. This model can provide technological support for further research on the dynamic effects of non-point source pollution on water quality.

关键词： non-point source pollution pollution loads, export coefficients plain river network

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Effect of non-point source pollution on water quality of the Weihe River

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International Journal of Sediment Research 2011年第1期26卷 50-61页

作者： LI Jiake~(1*),LI Huaien~2,SHEN Bing~3,and LI Yajiao~4 Xi’an University of Technology,Key Lab of Northwest Water Resource and Environment Ecology of MOE,Xi’an,Shaanxi,710048,China Xi’an University of Technology,Key Lab of Northwest Water Resource and Environment Ecology of MOE,Xi’an,Shaanxi,710048,China, Xi’an University of Technology,Key Lab of Northwest Water Resource and Environment Ecology of MOE,Xi’an,Shaanxi,710048,China, School of Architecture and Civil Engineering,Xi’an University of Science and Technology,Xi’an,Shaanxi, 710054,China, Associate Prof. Dr. Xi'an University of Technology Key Lab of Northwest Water Resource and Environment Ecology of MOE Xi'an Shaanxi 710048 China Prof. Dr. Xi'an University of Technology Key Lab of Northwest Water Resource and Environment Ecology of MOE Xi'an Shaanxi 710048 China Dr. School of Architecture and Civil Engineering Xi'an University of Science and Technology Xi'an Shaanxi 710054 China

non-point source pollution is an important factor that affects the water quality of the Weihe *** study the effect of the pollution on the water quality of the Weihe River,five flood events and three normal discharge events during non-flood period were monitored from July to December in 2006,at the Lin-tong *** order to identify how sediment influenced the water quality of the river,raw and supernatant samples taken from the monitored events were *** samples were siphoned from 5 cm below the water surface of the raw samples at the lab afterwards the raw samples were shaken up and laid for 30 minutes in the *** results indicated that:1) The concentrations of SS,COD,TP and TN in the raw samples from flood events were higher than those from normal discharge *** higher values of the COD,TP and TN in the raw samples resulted from natural humic matters in surface soil.2) The load transport rate of analyzed water quality indexes increased gradually to its maximum and then drop down,matching that in the discharge *** concentrations of SS,NH-N,NO-N,NO-N,COD,and TP in the raw samples increased initially and then decreased,while the concentration of dissolved orthophosphate and TN in the raw samples decreased gradually and then *** peak time of concentration and load transport rate of SS as well as COD,TP and TN in the raw samples were close to or lagged behind the time of peak flow. Generally,the peak time of concentration and load transport rate of dissolved orthophosphate, dissolved total-phosphate,NH-N,NO-N,and NO-N occurred prior to the time of peak flow.3) The mean concentration method was used to calculate the NPS pollution load at Lin-tong section,and the results are *** 2006,the proportions of the NPS pollution load to the total load for COD,TP, TN and inorganic nitrogen were more than 30%.

关键词： Weihe River non-point source pollution Flood Monitoring Load

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Loss coefficient of nitrogenous non-point source pollution under various precipitation conditions

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Frontiers of Environmental Science & Engineering 2008年第2期2卷 230-235页

作者： Hongguang CHENG Fanghua HAO Xiyan REN Shengtian YANG Wen XIONG Shaoping LEI School of Environment Beijing Normal UniversityState Key Laboratory of Water Environment SimulationBeijing 100875China The Water Resources Protection Scientific Research Institute of the Yangtze River Wuhan 430051China

In this study,calibrations of non-point source(NPS)pollution models are performed based on Black River basin historical real-time runoff data,sedimentation record data,and NPS sources survey *** concept of NPS loss coefficient for the watershed or the loss coefficients(LC)for simplicity is brought up by examining NPS build-up and migration processes along riverbanks in natural river *** historical data is used for determining the nitrogenous NPS loss coefficient for five land use types including farmland,urban land,grassland,shrub land,and forest under different precipitation *** comparison of outputs from Soil and Water Assessment Tool(SWAT)model and coefficient export method showed that both methods could obtain reasonable *** high Pearson correlation coefficient(0.94722)between those two sets of calculation results justified the consistency of those two *** result in the study is that different combinations of precipitation condition and land use types could significantly affect the calculated loss *** for the adsorptive nitrogen,the order of impact on LC for different land use types can be sorted as:farm *** *** *** while the order was *** *** *** land for soluble nitrogen.

关键词： non-point source pollution land uses loss coefficient Heihe River Basin

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Role of rural solid waste management in non-point source pollution control of Dianchi Lake catchments, China

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Frontiers of Environmental Science & Engineering 2008年第1期2卷 15-23页

作者： Wenjing LU Hongtao WANG Department of Environmental Science and Engineering Tsinghua UniversityBeijing 100084China

In recent years,with control of the main muni-cipal and industrial point pollution sources and imple-mentation of cleaning for some inner pollution sources in the water body,the discharge of point source pollution decreased gradually,while non-point source pollution has become increasingly distressing in Dianchi Lake *** one of the major targets in non-point source pollution control,an integrated solid waste controlling strategy combined with a technological solution and man-agement system was proposed and implemented based on the waste disposal situation and characteristics of rural solid waste in the demonstration *** the key techno-logy in rural solid waste treatment,both centralized plant-scale composting and a dispersed farmer-operated waste treating system showed promise in rendering timely ben-efits in efficiency,large handling capacity,high quality of the end product,as well as good economic *** encountered during multi-substrates co-com-posting such as pathogens,high moisture content,asyn-chronism in the decomposition of different substrates,and low quality of the end product can all be tackled.92.5% of solid waste was collected in the demonstration area,while the treating and recycling ratio reached 87.9%,which pre-vented 32.2 t nitrogen and 3.9 t phosphorus per year from entering the water body of Dianchi Lake after imple-mentation of the project.

关键词： co-composting Dianchi Lake catchments non-point source pollution rural solid waste

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