Water balance and distribution law of red-soil sloping lands
A series of data about water balance and distribution of red-soil slopes in three land-cover conditions, namely planted with Bahia grass (Paspalum notatum Flugge), mulched with Bahia grass residue and bare, during the natural rainfall process were acquired by building large soil infiltration devices, and analyzed in order to realize the water balance and distribution law of red-soil slopes based on the principle of water balance. The results showed that surface runoff on the plots planted with Bahia grass, mulched with Bahia grass residue reduced by 19.4 and 12.8 times than it on the bare plot respectively. Interflow decreased by 7.1 and 8.7 times, and underground runoff increased by 47.4 percent and 88.7 percent in same condition. These indicates that soil and water conservation measures could reduce surface runoff, increase rain infiltration and underground runoff, and achieve the purpose of controlling flood and reducing natural disaster. The evapotranspiration of the plots planted with Bahia grass were 1.76 and 1.18 times in contrast to it on the plot mulched with Bahia grass and bare plot respectively. So mulched measure could not only conserve water and prevent flood disaster, but also reduce evapotranspiration. The annual transpiration of Bahia grass was between 93.20 to 268.79 mm in red-soil area of south China.
red-soil sloping lands water balance distribution law infiltration
Zuo Changqing
国际会议
西安
英文
1099-1103
2010-10-11（万方平台首次上网日期，不代表论文的发表时间）