桂西北退耕还林模式下小流域径流特征研究  

Research on the Runoff Characteristics of Small Watershed under the Reafforestation Patterns in Northwest Guangxi

作　　者：李保平[1] 黄承标[1] 庄嘉[1] 赖家业[1] 陈朝山[1] 

机构地区：[1]广西大学林学院,广西南宁530005

出　　处：《安徽农业科学》2009年第7期3082-3084,共3页Journal of Anhui Agricultural Sciences

基　　金：广西退耕还林工程建设效益监测项目(AB180102)

摘　　要：通过对桂西北石山区退耕还林样地进行地表径流量调查研究,发现不同类型地表径流的变化规律,为该地区退耕还林工作提供依据,从而选择更有效的退耕还林类型,加快该地区生态环境的恢复。研究结果表明:①地表径流跟土壤理化性质以及气温有关,月地表径流量与当月的日平均降雨量有关。②3个样地年平均地表径流量为:喜树人工林(2.52 mm)>玉米地(2.17 mm)>喜树+吊丝竹人工林(0.84 mm),说明喜树+吊丝竹样地的地表径流量较小,其保持水分效果比喜树和玉米样地好,是较好的退耕还林模式。③不同植被类型地表径流量与降雨量的关系为:地表径流量与降雨量存在一定的线性关系,总体的趋势是地表径流量随着降雨量的增加而增大,两者呈正相关,但是地表径流量与降雨量不是正比关系,两者相关性不显著。The amount of surface runoff in the mode of retuming farmland to forest in Northwest Guangxi was surveyed and studied. And the change laws of different types of surface runoff were found, which could provide the basis for returming farmland to forest and choose the more effective types of returning farmland to forest to speed up the recovery of the ecological environment in the region. The results showed the surface runoff had relationship with physical and chemical properties of soil,as well as teraperature. The monthly surface runoff had the relationship with the average rainfall in the month. The average annual surface runoff in three three sample plots were as follows： Camptotheca acuminata plantation （2.52 mm） 〉 corn （2.17 mm） 〉 Camptotheca acuminata ＋ D. minor （McClure）Chia et H.L.Fung plantation（0.84 mm）. The results indicated that the amount of surface runoff in sample plot of Camptotheca Acuminata and D. minor （McClure）Chia et H.L.Fung was less,its water retaining effect was better than that of corn sample plots. So it was the better reafforestation patterns. The surface runoff and rainfall amount of different vegetation types showed a certain linear relationship. The overall trend was that the surface ranoff increased with the increasing of rainfall, with a positive correlation. But they had no direct proportion relationship and their correlativity was not significant.

关 键 词：地表径流 退耕还林模式 降雨量 桂西北 

分 类 号：S755[农业科学—森林经理学]