摘要
艾比湖自2.5万年以来湖面从3000km^2缩减为本世纪初的1310km^2,到本世纪50年代至80年代初,湖面由1200km^2迅速缩减为522km^2,平均每年退缩21.2km^2,是2.5万年以来退缩速度的300倍.解放以来平均每开垦1万亩土地,湖面约退缩2.25km^2,其主要原因是人类活动所致,垦荒造田引水灌溉导致退缩的因素占85%以上;森林植被破坏引起入湖水量减少的因索不到10%;而大气环流周期性变化引起干旱的波动因素占2-5%。由于艾比湖所处的地理位置,它的存在和退缩对生态环境意义重大,应采取强有力措施加以保护。
From 250 thousands year ago to 1900's, the water surface of AiBi Lake decreased from300km^2 to 1310km^2,decreasing averagely 0.07km^2/y.During 1950's-1980's,the Lake areasdecreased rapidly from 1200km^2 to 522km^2,averagely deereasing 21.2km^2 / y, which is 300times decreasing speed than that during 250 thousands years ago. Since 1949,the Lake areashas been decreased 2.25km^2 averagely when one mu wasteldround was openedup.The mainfactars of decreasing Lake area is opening up wasteland and irrigating by Lakewater(85%);forest and plant to be destroied(10%);The drought fluctuation of atmosphericcirculational periodic changing(2%-5%). The declining of AiBi Lake has Cased a intense effect on ecologic environment in thisregion.So a affective proteet measure to AiBi Lake should be performed.
出处
《干旱区地理》
CSCD
北大核心
1990年第4期62-67,共6页
Arid Land Geography
