Study On The Layout Of Water Ecological Unit In Gaoyi Village

As the upstream water source of most rivers and lakes and the important part of providing energy and material input to the urban ecosystem,the security of environmental pollution is particularly important.Rural environmental remediation is large and wide,resulting in environmental pollution,high end governance costs,poor results,and its contaminated soil,water,etc.,destroyed the fundamental agriculture,shaken the basis of food health.Only source governance can solve these problems.Rural environmental pollution is mainly caused by non-point source pollution of water,and its transmission path has certain regularity.In this paper,the Gaoyi Village in Huitong County,Hunan,Huaihua province is taken as the object of study.The layout of water ecological unit is taken as the research objective,and non-point source water pollution is taken as the research content.In the comprehensive environmental engineering and city planning based on multi discipline based on the domestic and overseas non-point source pollution related analysis,spatial analysis of non-point source pollution of surface water in the village,and based on the "source sink" theory of non point source pollution of surface water influence of land suitability evaluation,the the evaluation of land suitability evaluation compared with the conventional land suitability,based on the conclusions above,the planning and design of water ecological unit facilities layout.The research contents and conclusions are as follows:1.The establishment of the Gaoyi Village research area of the GIS database.Through the collection and collation of the Gaoyi Village,the use of Arc GIS technology platform,the study area topography,slope,elevation,land cover,land use nature of the integration,and study area hydrological analysis.2.The water quality sampling and monitoring reports of several monitoring sites in the study area were analyzed.By using Arc GIS hydrological analysis,the intersection point between the watershed and the watershed is obtained,and the concentration point is extracted as a typical control point to monitor the water quality of the control point.3.The influence analysis of non-point source surface water pollution is obtained.Of different landscape types on the surface water pollution landscape "source sink"ecological process of decomposition,from the runoff reduction,influence the analysis results on non-point source pollution of surface water utilization situation of land comprehensive analysis of primary rainwater pollution and water pollution degradation three.The results show that the non point source pollution of surface water in study area mainly concentrated in the two major surface runoff system,based on the impact of non-point source pollution of surface water environmental remediation of the village,should consider the environmental impact of the two surface runoff on the village.The study on monitoring the impact of hydrological data point and non-point source pollution of surface water in the area of data were analyzed by using SPSS software,analysis of total nitrogen(TN),total phosphorus(TP)and ammonia nitrogen(NH3-N)and impact analysis data has significant correlation,demonstrates the reasonable reliability of the analysis process.4.The land suitability evaluation system based on non-point source surface water pollution is established.First of all,establish the conventional land suitability evaluation system.Using the Arc GIS analysis platform to analyze the impact of the conventional land suitability evaluation indicators,combined with expert scoring method and analytic hierarchy process(AHP)to determine the weight and superposition.The conventional land suitability evaluation was obtained.The influence analysis of non-point source surface water pollution is combined with the conventional land suitability evaluation factors.The expert scoring method and the analytic hierarchy process(AHP)are adopted to determine the weight and overlap.Land suitability evaluation based on non point source pollution is obtained.The results show that the village is construction land and construction land is mainly located in the study area,southwest,northwest,northeast and north west direction,a semi enclosed structure around the appropriate construction land and construction land,ecological sensitivity in the region is strong,not suitable for the development and construction of large strength and other development activities;suitable for construction land and construction land is mainly located in the areas along the river valley and flat areas,the high risk area of the surface water pollution across the main land area suitable for construction.5.Get the Gaoyi Village water ecological facilities layout.In view of non-point source surface water pollution,from the point of view of "source" and "sink" of landscape ecology process,the landscape optimization design of the study area is carried out.The biogas pond,ecological weir pond,vegetation buffer belt and water buffer belt are respectively set up to reduce the influence of water pollution,and enrich the ecological landscape of the village.