Hydrological and Ecological Effect of Three Man-madeForests in Muding County of Yunnan Province
The experiment employed the techniques of standardized runoff plot to research fixedly and quantitatively the abilities of the runoff control of three kinds of man-made forests and canopy hydrological effects in Muding county of the upper Yangtze River area in 1998 and 1999. The results indicated that the land surface runoff volume was respectively 35.19 m3/a, 8.42 m3/a,15.95 m3/a,10.63 m3/a in the plots of non-forests P.yunnanesis ,E.maedenii and A.mearnsii community. The abilities of the runoff control of the man-made forest communities were much greater than non-forest contrast, and among three man-made communities, mixed Eucalyptus maidenii-Acacia mearnsii community and Pinus Yuannanensis community were superior to other communities. Moreover, man-made forest communities have lower frequency of runoff at the same rainfall condition. Man-made forest communities produced runoff only when the rainfall intensity was up to 0.4～1 cm/h compared to < 0.3 cm/h when non-forest contrast just begun to. For the hydrological effects of canopy, the interception rate of A.mearnsii was the highest among three tree species, but there was the high stemflow on the stem of P.yunnanensis. The mathematical models that could predict the canopy entrapment volume, stemflow volume, throughfall of several communities have been given.
国家科技期刊平台
NSTL
万方数据
维普
