摘要
利用SEBAL模型并集成MODIS卫星数据,计算了三江平原2006年生长季5—10月的地表蒸散量,结合降水量数据,借助GIS技术对主要生态类型的耗水和水分盈亏状况进行分析。计算结果表明:森林、湿地、旱田和水田生态系统在2006年生长季的耗水量分别为697.14、562.21、486.17和523.52mm,森林生态系统的蒸散量大于其他生态系统;从2006年生长季总体来看,三江平原北部和中部区域耗水量要小于降水量,东部、南部和西部则相反。森林、湿地、水田和旱田生态系统在2006年生长季水分盈亏量平均值分别为-193.46、-23.38、-1.86和37.59mm;从湿地、水田和旱田的水分盈亏情况对比来看,湿地开垦为水田比湿地开垦为旱田更适于当地的自然条件;对于农作物来说,从整个生长季来看三江平原降雨量可以基本满足地表蒸散的需求,但是时空不匹配,在特定的月份上,会出现干旱。
The water consumptions and water budget for the Sanjiang Plain were studied with GIS technique based on the data of evapotranspiration estimated by SEBAL model, MODIS satellite data （MODllA1, MOD13A2, MOD43B3） and precipitation data. The results show that the seasonal water consumptions of forest, wetland, dry farmland, paddy field were 697.14, 562.21, 486.17, 523.52mm respectively in 2006. The average evapotranspiration of forest was much more than other ecological systems. The seasonal water consumption was more than the precipitation in the northern and middle part of Sanjiang Plain. Contrarily, the water consumption was less than the precipitation in the eastern, southern and western parts of this district. The average seasonal water budgets of forest , wetland , dry farmland , paddy field were -193.46 , -23.38, -1.86 and 37.59mm respectively. The comparison of seasonal water budget of paddy field and dry farmland shows that paddy field fits the water supply condition better than dry farmland in this district. The precipitation in Sanjiang Plain can meet the requirement of land surface evapotranspiration during the growth season, 2006. However, the spatial and temporal distributions of precipitation were unmatched with water consumptions. Drought may occur in several months.
出处
《水利学报》
EI
CSCD
北大核心
2010年第2期155-163,共9页
Journal of Hydraulic Engineering
基金
中国科学院知识创新工程方向性项目(KZCX2-YW-340)
973计划项目课题(2009CB421103)
中国科学院东北地理与农业生态研究所知识创新工程领域前沿项目(C08Y46)
关键词
耗水量
水分盈亏
蒸散量
SEBAL模型
MODIS卫星数据
三江平原
water consumption
water budget
evapotranspirafion
energy balance
SEBAL model
MODIS satellite data
Sanjiang Plain
