Evaluation Of Water Resources Utilization Efficiency In Beijing-Tianjin-Hebei Suburban Agricultural Parks

The water resource is in shortage in Beijing-Tianjin-Hebei Region,the agricultural parks are as the large consumer of water and the water resource has always been the shacking factor of constraining the development of agricultural parks.Especially the agricultural parks that are located in the urban surroundings those require to balance the water resource distribution among cities,which raises the stricter requirements to the rational utilization of water resource.It puts forward to the methods of performing the quantitative evaluation to the utilization level of water resource in the agricultural parks in Beijing-Tianjin-Hebei Region,which can provide the reference for such kind of agricultural parks to understand their own utilization levels of water resource.First of all,on the basis of literature review and combined with the field survey,it concludes and analyzes the using situation of water resource in the agricultural parks,as well as abstracts the affecting factors for the using level of water resource in the agricultural parks.Secondly,through the adaptability comparison analysis to the main evaluation methods for the utilization of water resources,combined with the research features,it constructs the evaluation analysis model for the utilization of water resource in the agricultural parks.It applies the Extension Analytic Hierarchy Process to perform the weighting,as well as integrated with the fuzzy evaluation method for evaluation.In the course of evaluation,it applies the folding subjection function to confirm the subjection of level,as well as the proportionate allocation method to perform the calculation for comprehensive evaluation value.Finally,it carries out the case analysis of evaluation system to the typical park Xinyuan Yangguan Agricultural Park.The criterion layers for constructing the evaluation system are including three aspects e.g.water resource,used water and recycled water.There are 13 indexes to constitute the index layer,which are including the guarantee rate of water supplying,proportion for water supplying of external water,proportion for water supplying of underground water,proportion for water supplying of non-conventional water resource,controlling rate for total volume of annual run-off,average water consumption per unit area of farm irrigation,average water consumption per unit area of landscape areas,irrigation rate,coefficient for utilization of irrigation water,index for utilization efficiency of aquaculture water,index for utilization efficiency of life water,recycled water utilziation rate and recycled water quality control rate;It is indicated through the weight calculation that the weights for the three criterion layers e.g.water resource,used water and recycled water are 0.132,0.792 and 0.076 respectively,in which the weight for the criterion layer of used water is the largest,and the used water index shall be as the core index of evaluation;in the criterion lay of used water,the comprehensive weight for the irrigation rate,average water consumption per unit area of farm irrigation and coefficient for utilization of irrigation water are large,which are 0.266,0.178 and 0.145 respectively,and they shall be taken as the main indexes of evaluation;it is indicated through performing the evaluation to the typical agricultural park with the selected model that the comprehensive evaluation values for the utilization of water resource of this agricultural park in 2015,2016,2017 and 2020 are 0.2441,0.4183,0.6024 and 0.7131 respectively.The changes in the comprehensive evaluation values of four years can accurately reflect the efforts that this agricultural park has made with respect to the utilization of water resource e.g.irrigation and utilization of non-conventional water resource etc.