Ecosystem Hydrological Effects And Their Response To Ecological Services In The Guanzhong Urban Agglomeration

Urbanization is the current human activity with the most drastic impact on the ecosystem.It is important to be able to correctly understand the spatial and temporal evolution patterns of ecosystem patterns and to elucidate the response relationship between water resources carrying capacity and ecological services for the coordinated development of ecosystems in the region.Based on this,this paper selects the Guanzhong urban agglomeration as the research object,uses remote sensing images,soil types,meteorology,socio-economic data and other models such as ArcGIS,InVEST,TOPSIS and coupling coordination,analyzes the spatial and temporal evolution of regional ecosystem patterns,simulates and estimates ecological services such as water production,soil conservation,carbon storage and habitat quality,and explores and analyzes water resources The spatial and temporal variation characteristics of water resources carrying capacity and its barrier degree factor were analyzed,and the response relationship between water resources carrying capacity and ecosystem services was analyzed.The main results achieved are as follows:(1)From 1995 to 2018,the spatial pattern of ecosystem changes in the Guanzhong urban agglomeration was remarkable,and the overall spatial pattern of landscape types was relatively complex,and the landscape types were gradually distributed evenly in space,and the biodiversity was improved.By adding "stepping stones" and other measures,the optimized ecological network has 25 ecological sources and 300 ecological corridors,and the α-index,β-index and γindex of the ecological network before and after the optimization have increased by 0.59,1.77 and 0.38,respectively,0.38,and finally the ecological network was optimized.(2)From 2010 to 2018,the water resources carrying capacity of Guanzhong city cluster as a whole was in a critical state of water resources,showing a trend of first decreasing and then increasing,and the variability of its spatial distribution showed a trend of first increasing and then decreasing,and the water resources carrying capacity level of each city failed to reach the bearable state(level I).The top 6 maj or barrier indicators affecting the water resources carrying capacity are water consumption for ecological environment,water production modulus,water resources development and utilization rate,tertiary industry share,water supply modulus and per capita water resources.(3)The spatial pattern of coupling and coordination between water resources carrying capacity and its ecosystem services in the Guanzhong urban agglomeration from 2010 to 2018 varies significantly,showing a pattern of high in the southwest and low in the northeast;Xi’an and Baoji have good ecological service functions and water resources carrying capacity,and they belong to good coordination level overall;Tongchuan basically belongs to basic coordination level,with small changes during this period;while Xianyang and Weinan are out of tune overall,and their ecosystem services and water resources carrying capacity are both at low values and have a tendency to decrease.