兴隆山保护区林缘蒸发量观测研究

A Preliminary Study of Evaporation for the Edge of Forests in Xinglong Mountains

通过峡口观测点21a蒸发量得出:兴隆山保护区林缘的年平均蒸发量是1210.3mm,范围在1 370.3～1044.8mm之间,相差325.5mm;月平均蒸发量是100.9mm,范围在67.6～141.7mm之间,相差74.1mm,变化很大.观测结果表明:该现象主要是由于随气温升高,降水量增多,土壤潮湿、水位高、颜色深,林冠叶面积增大造成.变化总趋势是后10a约高.

In Xinglong mountains,the average annual evaporation for the edge of forests was 1 210.3 mm,the limits were 1 370.3~1 044.8 mm,and the difference was 325.5 mm.The monthly average evaporation was 100.9 mm,the limits were 67.6~141.7 mm,and the difference was 74.1 mm.The changes were chiefly caused by the rising temperature,higher precipitation,damper soil,higher water level,and the deep colours of the foliage and bigger area of crown leaves.The general trend of the latest 10 years was higher than the previous years.