Study On Land Use And Ecosystem Service Value In Erhai River Basin

By interpreting the sensing images of Erhai basin in2001and2010, this paperobtains basic data of two periods of land use changes in Erhai basin. according to thebasic date, this paper analyzes the changes in spatial differentiation pattern of land usetypes, the degree of changs and the value of ecosystem services,this paper draws thefollowing conclusions:（1）the analysis results of land-use change shows that: from2001to2010, themainly land use types in Erhai basin are following: Other grassland converted towoodland shrub(Niujie Township, the eastern area of three Ying Town and the northarea of the town of phoenix feather, etc); shrub land converted to forest land(Such as,the eastern surface hills of Erhai, Cangshan Dongpo hill area); part of the residentialland converted to dry lands(the eastern aren of Erhai Lake),which makes the area ofother grassland, shrub land and residential land decrease, the area of forest land anddry land increase. A water area of nearly10years has been basically unchanged.Analysis of dynamic degree indicated that: during10years, the maximum degree ofreduction is grassland; the second is the other land; the third is the residential land. themaximun degree of increase is arable land; the second is woodland. Water and waterconservancy facilities will remain basically unchanged, its dynamic is0.this indicatesthat the pattern of land use will develop forward better and more standardizeddirection.（2）on the basis of service function of equivalent factor table of china,Combined with the actual situation in Erhai River Basin, we get service function ofequivalent factor table of Erhai basin. according to the magnitude of value formula,we get the economic value of food production services which Erhai area provide in2001and in2010is866.59RMB/hm2, in2010is2637.34RMB/hm2. Based on twoperiods of the unit price of providing services for food production and the area ofvarious ecosystem types of Erhai basin, we get that total service value of ecosystem of Erhai River Basin in2001is5029.21×106RMB, in2010is16228.20×106RMB. Thevalue of ecosystem services is significantly increasing, indicating that during the10years land use in Erhai basin is increasingly rationalized.(3) according to the change of the proportion of a variety of land use typesaccounting for the total value of ecosystem services, we get that during10-year periodthe economic value of ecosystem service function of meadows, river and lake anddesert is reducing, the reduction of the rate respectively-7.36%、-1.17%、-0.02%.According to the change of the ecosystem service value rate sort, Forest> Fields’>desert>’rivers/lakes> grassland, it indicates that during two period. the ecosystemservice value of the Land use types is changing. From each of the functional changesof ecosystem services perspective, Erhai basin ecosystem services function are on therise, the largest increase among hydrological regulation,2151.99×106RMB;Second isto maintain biodiversity,1583.92×106RMB;Food production in the magnitude ofvalue watershed services is the lowest.(4) according to the actual situation of Erhai River Basin, we propose thesustainable development safeguard measures for ecological environment of Erhairiver basin Specifically listed:①strengthening the system construction, providing theguarantee for sustainable develpment;②adjusting reasonablely the land use ofdistribution pattern in Erhai basin;③relying on science and technology, promotingecological environment construction;④strengthening environmental protectioncampaigns to raise the people’s awareness of environmental protection watershed;⑤implementing of ecological protection project constructing ecological demonstrationzones Basin.