A Study On The Change Of Habitat Quality In The Qi River Basin Of Taihang Mountain Based On LUCC

With the in-depth study of global change,land use/cover change is considered as one of the main driving forces of global environmental change.Taihang Mountain Qihe river basin is located in the transition zone of the North China Plain,is fragile mountain ecosystems typical and complex.Since the reform and opening up,with the acceleration of urbanization in the Qihe River Basin,the population has significantly increased,and human activities have begun to expand to a disorderly extent in mountainous areas.The strength and scope of land use have gradually expanded,which has a great impact on the quality of ecosystem habitats.Triggering a series of ecological and environmental problems,the contradiction between land use system and ecosystem has become increasingly prominent.Therefore,analysis of the basin evolution of land use/cover change time,to study its effect on habitat quality on the basis of this,to provide a scientific basis for ecological environment protection and rational use of natural resources,has very important significance to sustainable development of maintaining the natural balance of system and region.This paper selects Taihang Mountain Qihe River Basin as the research object,using the system theory,sustainable development theory and other related theory research on the change and its driving forces of the land use/cover change in the Qihe River Basin during 2005-2015.First of all,quantitative analysis and qualitative description of land use/cover change in watershed from the aspects of quantity,dynamics,space and transfer matrix;Then,from the aspects of altitude,slope,terrain,river water,economic density and population of road traffic and rural settlements to analyze the impact of the natural and social economic factors of Qihe river basin land use/cover change;Finally,from habitat degradation index and habitat quality index of the two aspects of river basin are analyzed by using Habitat Quality overall habitat quality module of InVEST model,and studied 10 years of Qihe river basin land use/cover change effects on habitat quality.Research indicates:(1)Grassland,cultivated land and forest land are the main types of land use/ cover in the Qihe River Basin.The sum of the three areas accounted for more than 90% of the total area of the study area during the study period.In the past 10 years,the area of arable land decreased,and the total area of woodland decreased,while grassland and construction land increased gradually.Dynamic analysis of land use/cover change in the study area shows that during 2005-2015,the cultivated land in the Qihe River basin decreased year by year,the unutilized land and construction land increased rapidly,the dynamic degrees of single land use of the three were-1.53%,43.8% and 3.65% respectively.From 10 years of land use/cover type transfer matrix analysis,it can be seen that the reduction of cultivated land area in the Qihe River Basin is mainly for grassland and forest land,and the reduction of forest land area is for grassland and cultivated land.Through the analysis of land use/cover changes in all counties in the study area,it can be seen that the most significant changes are in Linzhou,Pingshun and Huguan.(2)Qihe river basin land use driving factor analysis result showed that: the cultivated land distribution at an altitude of <500m,the slope of 6 degrees to 15 degrees,relief in 30~70m area;forest land distribution at an altitude of >1000m,the slope of >15 degrees,relief in 70 ~ 200 m area;grassland distribution at an altitude of 200-1000 m.The slope of 6 degrees to 15 degrees,relief in 70 ~ 200 m area;water and land suitable distribution at an altitude of <500m,the slope of 2 degrees to 6 degrees,relief in the 0 ~ 30 m zone;unused land suitable for distribution at an altitude of >1000m,the slope of 6 to 15 degrees to 30 degrees,topographic 70 m zone.Population and economic density have the most significant impact on cultivated land and construction land in the study area.With the change of time,Qihe river water basin on land space attraction ability gradually weakened,with the increasing role of attracting the construction of rejection of woodland increased gradually,the weakening of rejection of grassland.Qihe River Road Traffic attraction of farmland has weakened the land for the construction of the space to attract the increasing role of change of rejection of woodland,grassland of rejection began to weaken,the water spatial attraction becomes larger.The attractiveness of rural residential areas to farmland in the Qihe River Basin has weakened over time,increasing the attraction to water bodies and construction land,gradually increasing the exclusion of forest land and gradually weakening the exclusion of grassland,the influence of the earth is getting smaller and smaller.(3)The Habitat Quality module of InVEST model was used to analyze the impact of habitat quality and its impact on habitat quality from 2005 to 2015 both from the habitat degradation index and habitat quality index.The results show that: Qihe River Basin overall habitat degradation degree overall to light degradation,and with the passage of time,no degradation and mild Qihe River Basin habitat degradation area ratio increasing,moderate and high and severely degraded habitat area proportion is declining,habitat degradation degree gradually improved;The results of habitat quality showed that the area of general habitat quality grade decreased significantly,and the area of quality and grade of important and highly important habitats increased.