%0 Journal Article
%T Land Use/Cover Change and Its Influence on the Evapotranspiration in Taoer River Basin<br>洮儿河流域土地利用变化对地表蒸散量的影响
%A LIU Qiang
%A HE Yan
%A CUI Bao-shan
%A <br>刘强
%A 何岩
%A 崔保山
%J 资源科学
%D 2007
%I 
%X Under the influence of the global change and human activity,the water cycle shows two-dimensional hydrological characteristic in the watershed.The evapotranspiration is one of the key taches of the water cycle,which embodiments the balance of the substance,energy and the information system.The evapotranspiration is closely related to the land use and land cover change.In this paper,the authors first give the dynamic characteristics of the land use and land cover change;and then,the tempo-spatial characteristics of the potential evapotranspiration by means of the Penman-Monteith equation.By interpreting Landsat TM images,dynamic information of land use in Taoer river basin in 1986,1996 and 2000 is obtained.The area of paddy field increased most,with a rate of(5 425.71) hm~2 per year,then the glebe and saline-alkali field followed,with a ratecof(3 983.56) hm~2 per year and(2 028.35) ha per year,respectively.The area of grassland and water decreased most,with a rate of(-8 571.30) hm~2 per year and(-3 952.25) hm~2 per year,respectively.Using Penman-Monteith equation,we get the evapotranspiration of Taoer river basin in growing season.Then, in the environment of ARC/INFO 8.3,crop potential evapotranspiraiton is obtained based on the analyses of land use.Monthly crop potential evapotranspiraiton shows as an inverse "U" curve in a year,and reaches its maximum in July.Yearly totals show an increment in 15 years,from 455 mm in 1986,507 mm in 1996 to 571 mm in 2000.Generally evapotranspiration increased obviously along the river from upper reach to lower reach,and its high values distribute in low plain of lower reach every year.Hemeroby in Taoer river basin is-0.0327 in 1986,-0.0122 in 1996 and 0.0394 in 2000.Hemeroby shows that the land use and land cover change in this region has amplified the effect of climatic change and reduced the regulation of land use and land cover pattern on evapotranspiration.Locally increasing evapotranspiration intensified soil salinization and induced a series of eco-environmental problems.
%K estern of the Songnen plain
%K Land use and land cover
%K Evapotranspiration
%K Salinization<br>松嫩平原西部
%K 土地利用/覆被
%K 蒸散发
%K 盐渍化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=9DEEAF23637E6E9539AD99BE6ABAB2B3&aid=2B2C9610630A3EF1&yid=A732AF04DDA03BB3&vid=771469D9D58C34FF&iid=E158A972A605785F&sid=CDEBD1ACE0A4C1C1&eid=6FBD78E3BAB60869&journal_id=1007-7588&journal_name=资源科学&referenced_num=0&reference_num=10