Quantitative Assessment And Spatial Pattern Of Water Production Service Flow In Shiyang River Basin

Ecosystem services,as products or services provided by ecosystems,have gradually become the entry point for people to pay attention to the relationship between the natural environment and human society.In recent years,scholars have realized that ecosystem service research is not just a static research on the balance of supply and demand.More and more researches have begun to pay attention to the particularity of different types of services and consider the impact of their mobility.Ecosystem service flow emphasizes the assessment of the temporal and spatial pattern of ecosystem services from the perspective of supply and demand,identifying the flow paths of ecosystem services from production to use,clarifying the characteristics of the spatial flow of various types of ecosystem services,and analyzing the flow volume and the resulting spatial flow The pattern plays an important role in exploring the formation,transmission,transformation and maintenance of ecosystem services,helps promote the study of the spatial correlation between ecosystem services and human well-being,and provides a scientific basis for water resources management and ecological protection and restoration.However,due to its relatively complex evaluation methods and many influencing factors in the flow process,it is still in the early stages of development and exploration.The Shiyang River Basin is located in the arid area of Northwest China.It is one of the three major inland river basins in the Hexi Corridor.It has a shortage of water resources and severe land desertification.It is a typical ecological environment fragile area and a climate change sensitive area.Water is a natural resource that humans rely on for survival.To clarify the quantitative relationship between water production services and human welfare and analyze its spatial flow pattern is conducive to the realization of the value of water production services in the river basin and the rational allocation of water resources.Therefore,comprehensively considering the typicality of ecological and environmental problems,the Shiyang River Basin,which is extremely lacking in water resources,is selected as the research area.Quantitative assessment and spatial pattern analysis of water production service flows in arid inland river basins have both theoretical and practical significance.Based on ecology,hydrology,geography and other theories,comprehensively use distributed hydrological models,Arc GIS spatial analysis and other methods to evaluate water production and water consumption in the Shiyang River Basin from2015 to 2017,analyze its spatial distribution,and identify water production services The main supply area and beneficiary area of the flow.Based on the above quantitative assessment,the flow path,flow direction,potential and actual flow and other attributes and spatial patterns of the water production service flow in the Shiyang River Basin are analyzed.Through the quantitative assessment of water production service flow and spatial pattern analysis,a basic understanding of the characteristics of water production service flow in the study area was formed,and relevant suggestions for water ecological resource management and ecological protection in the Shiyang River Basin were put forward.Firstly,a quantitative assessment of the water production service flow of the Shiyang River Basin was carried out,including water production evaluation,water consumption calculation,and identification of important water production areas and water consumption areas in the Shiyang River Basin.Based on the distributed hydrological model and using multi-source data such as meteorological data,land use data,and soil data,the temporal and spatial distribution characteristics of water production in the Shiyang River Basin are analyzed.From 2015 to 2017,the total water production of the Shiyang River Basin showed a trend of first increasing and then decreasing,showing a spatial distribution pattern of "high in the south and low in the north".Combining the water consumption data of the Shiyang River Basin and the GIS platform,the temporal and spatial distribution characteristics of water consumption in the Shiyang River Basin are analyzed.From 2015 to 2017,the total water consumption of the Shiyang River Basin showed a decreasing trend as a whole,indicating that the water-saving measures in the basin have achieved certain results.Based on regional environmental characteristics,water consumption structure of the river basin for many years,and artificial water allocation analysis,the important water production area and water consumption area of the Shiyang River Basin were identified by constructing a production-consumption relationship discriminant model.Secondly,based on the quantitative evaluation of the above water production service flow and analyzing its spatial attributes,the spatial flow pattern of water production service in the Shiyang River Basin is clarified.Based on hydrological data and land use data,based on the GIS platform,the natural flow path and artificial flow path of water production services in the Shiyang River Basin are analyzed.Calculate the potential flow of water production services in the basin through the production and consumption of water resources,analyze the actual flow of water production services using the irrigation water volume of the irrigation area,and analyze the water production services under the administrative unit of the river basin based on the average of the production and consumption in 2015-2017 Flow characteristics.In addition to identifying the main attribute characteristics of the water production service flow path,flow rate,etc.,it also determines the important initial flow,confluence node and fluid direction on the flow path.The Shiyang River Basin generally forms a spatial flow path that combines natural river channels and artificial ditches,with water flow as the main flow direction,Hongyashan Irrigation District as the primary flow area,Xiying River Irrigation District as the secondary flow area,and reservoirs Serve the spatial pattern of water production flows at important nodes.Finally,integrating the quantification and analysis of the aforementioned water production service flow,relevant suggestions are made for water resources management and ecological protection in the river basin.With hydrology,ecology,environmental science and other disciplines as theoretical support,analyze the existing or upcoming ecological and environmental problems in the Shiyang River Basin,from the perspective of water production service flow,according to the three major areas of the upper,middle and lower reaches of the basin Put forward water resources management recommendations.Comprehensively consider the coupling relationship between water resources,ecology and socio-economic systems in the Shiyang River Basin,and put forward corresponding ecological protection suggestions in terms of improving the water production service supply capacity of the river basin,exploring the ecological compensation mechanism of the river basin,and restoring the ecological protection of the river basin.It is expected to provide a reference for the management of the ecosystem of the Shiyang River Basin.In summary,this study takes water production services as an example to explore the research on the flow of ecosystem services in the Shiyang River Basin,and further proposes water resources management countermeasures and ecological protection suggestions under the background of ecological civilization.The conclusion will provide strong support for the construction of water ecological security and regional water resources management,ecological restoration,governance,compensation,etc.,and also provide reference for other inland river basin ecosystem service flow research.