Research On Water System Landscape Optimization Of Ganquan Lake Community Based On Water Ecosystem Service Value Evaluation

In the rural living environment,water system is a valuable resource,a necessary element to beautify the landscape,and an important condition to maintain the balance of the ecological system.In recent years,the integration of urban and rural areas is accelerating,and the economic development of rural areas is also changing with each passing day.However,the rapid economic development inevitably brings environmental problems.For example,the construction land used for rural business and residence often expands its area by encroaching on the ecological space of rural water areas such as pits and rivers,and the production and domestic wastes flow into adjacent rivers,pits and lakes due to the lack of effective control.These often lead to the deterioration of the water environment,the shrinkage of the water system network,and the reduction of ecological services,resulting in an unprecedented impact on the rural water system landscape.Traditional rural water system landscape planning is often carried out as a special project of general importance in rural landscape planning,while the governance of rural water environment often adopts simple and efficient water conservancy engineering measures.The coordination between the two is poor,and the application of ecological concepts is also lacking,which does not fully meet the needs of sustainable and ecologically balanced rural development.Therefore,it is particularly important to explore a planning method of rural water system landscape that can balance the needs of human and nature,connect water system ecology and landscape space,and excavate potential risks to prevent in advance.In view of this,this study introduces the concept of water ecosystem services,and on the basis of fully researching the relevant theories and investigating the research area,a two-way evaluation of the supply and demand of the rural water ecosystem is carried out.Then,based on the evaluation results,the strategy of rural water system landscape optimization is put forward.The main contents and achievements of this paper are as follows:(1)The optimization path of rural water system landscape under the balance of water ecosystem service supply and demand was proposed.This paper comprehensively expounds the relevant research and concept connotation of rural water system landscape planning and water ecosystem services,combs the morphological structure and service types of water ecosystem,and divides it into six typical system types: ditches,rivers,ponds,paddy fields,lakes and reservoirs.And four major categories: delivery services(P),adjustment services(A),cultural services(C)and support services(S).Then,based on the rural background and the theory of supply and demand,the water ecosystem service system is optimized,and finally the twelve dimensions of service system and the research path of "investigation-analysis-response" are constructed.(2)The evaluation system of water ecosystem service supply and demand was constructed according to the reality of Ganquan Lake community.Based on the investigation and analysis of the actual situation of natural resources,social economy and culture of Ganquan Lake community,through the interpretation and translation of rural spatial form and rural demand of Ganquan Lake,Selected the agricultural production,agricultural irrigation,providing fresh water,water purification,rain flood regulation,soil and water conservation,waterfront settlement,waterfront aesthetic,recreational recreation,ecological tourism,and provide habitats as well as maintaining biodiversity under the different dimensions of 22 supply index factors,and demand indicators corresponding to the twelve dimensions of ecological,industrial,livable and culture-oriented.All above constitute the water ecosystem service supply and demand evaluation system of Ganquan Lake community.(3)Combined with the results of supply and demand two-way evaluation,this paper analyzes the problems and puts forward the corresponding optimization strategy of water system landscape.Water ecosystem services of supply and demand ratio(WESDR),and the application of quadrant differentiation model will be intuitive analysis of supply and demand are conducted.The results show that in general,the spatial distribution of low-elevation and low-elevation mismatch patterns in Ganquan Lake community is relatively scattered.This shows that the water system of the whole ecological landscape fragmentation phenomenon exists.In view of these problems,corresponding optimization strategies were put forward from six aspects: optimizing the overall water system pattern,strengthening storm water safety control,improving water quality regulation ability,optimizing the water system biological community,promoting the promotion of diversified industries and improving the rural waterfront landscape.