CAJ | 학술논문

蒸散发的估算在区域能量平衡和水分循环研究中具有重要意义．本研究利用 Landsat 5TM 数据和能量平衡模型相结合，通过遥感数据获取各参量，对祁连山区的日蒸散发进行估算，研究表明估算值与实测值基本一致，相对误差为4.23％，基本上满足了该区域蒸散发研究的精度要求．通过对蒸散结果的分析发现，该区域的日蒸散发空间分布受气候特征、地形因素、土壤供水条件及土地利用类型的影响比较严重，其分布趋势主要在空间上表现出随海拔的降低而降低，阳坡蒸散量大于阴坡，在土地利用类型上呈现按照“林地＞沼泽地＞水域＞草地＞耕地＞城乡工矿居民用地”的类型而降低的规律，而永久性冰川雪地以及裸土裸岩石砾地的蒸散发则随冰川面积的缩小而减小．
증산발적고산재구역능량평형화수분순배연구중구유중요의의．본연구이용 Landsat 5TM 수거화능량평형모형상결합，통과요감수거획취각삼량，대기련산구적일증산발진행고산，연구표명고산치여실측치기본일치，상대오차위4.23％，기본상만족료해구역증산발연구적정도요구．통과대증산결과적분석발현，해구역적일증산발공간분포수기후특정、지형인소、토양공수조건급토지이용류형적영향비교엄중，기분포추세주요재공간상표현출수해발적강저이강저，양파증산량대우음파，재토지이용류형상정현안조“임지＞소택지＞수역＞초지＞경지＞성향공광거민용지”적류형이강저적규률，이영구성빙천설지이급라토라암석력지적증산발칙수빙천면적적축소이감소．
The estimation of evaporation in regional energy balance and water cycle research is of great significance. In this study ,we simulated the daily evapotranspiration of the Qilian Mountains by the TM , SEBAL model and various parameters obtained through remote sensing data ,found that the estimates con-sistent with the measured values ,the relative error is 4.23% ,basically meet the regional evapotranspira-tion of accuracy. T hroughanalysis of the results found that the region spatial distributionof evapotranspira-tion seriously affected bythe climate characteristics ,terrain ,the water supply conditions of soilandtheland-use types. In space ,the distribution trend is mainly demonstrated decreases with decreasing with altitude , sunny slope’s evapotranspiration greater than shady slope’s;and in land use types ,present on land use types in accordance with the“forest land > water area > the marsh grass > cultivated land > land for ur-ban and rural residents of industrial” type of law ,and the permanent glaciers and snow and bare soil bare rock is fertile land evaporation decreases with glacier area reduction.