森林植被变化的水文生态效应研究进展

从森林植被变化对水量、径流泥沙和水质的影响等方面介绍了国内外森林植被变化水文生态效应研究进展。从世界各国的研究来看，普遍的研究结论认为森林减少可以增加流域年产水量；森林植被可以较大幅度地减少径流泥沙含量；森林植被参与生物地球化学循环，可以有效地改善溪流水质状况。由于影响森林水文生态效益的环境异质性的普遍存在，森林植被变化水文生态效应影响程度在不同水文生态区差别很大，因此，要想将一个地区森林植被水文生态效应研究结果可靠地外推到其他地区其他流域，必须重视森林水文生态过程动力学机制的研究。

Advances in the Study of Ecohydrological Effects from Vegetation Changes

The research progress in the ecohydrological variations resulted from the vegetation changes including water yield,sendiment output,and water quality,was summaried.The penomena of annual water yield increase following the cut down of the forest was generally observed at the worldwide scale.Forest vegetation can control the erosion magnificently and purify water quality viabio geochemical cycling.However,the ecohydro logical effects vary greatly among different hydrological regions because of the widespread environmental heterogeneity.Inorder to extrapolate confidently the results from one area to another,More research is needed to underst and them echnisms of hydro logic cycle.