排序方式: 共有1条查询结果,搜索用时 15 毫秒
1
1.
Shoji Noguchi Abdul Rahim Nik Baharuddin Kasran Makoto Tani Toshiaki Sammori Kazuhito Morisada 《Journal of Forest Research》1997,2(2):115-120
Soil physical properties and water movement within soil were investigated using dyes in a tropical rain forest, the Bukit
Tarek Experimental Watershed of Peninsular Malaysia. The saturated hydraulic conductivity (K
s) decreased with increasing soil depth. TheK
s values were higher than those reported for other tropical soils. The geometric means of theK
s values ranged from 4.69×10−3 (80 cm) to 4.07×10−2 cm s−1 (10cm). This suggests saturation overland flow may not be dominant but that subsurface flow must play an important role in
stormflow generation. The shapes of the soil moisture characteristic curves resembled those of forest soils which have large
changes in volumetric water content at pressure heads <30 cmH2O. The relatively high conductivities were due to the presence of a porous zone of decomposed root channels which existed
continuously in vertical direction. Besides decayed roots, living roots also encourage preferential flow in vertical and lateral
(downslope) directions. Termite activities may also form water flow pathways in tropical regions. These detailed results help
us analyze water flow within the soil in tropical rain forests. 相似文献
1