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一、前言小良水保站为了比较不同林型对防止侵蚀保持水土的效果,建立了三个小流域径流槽的观测点:①混交林地观测点,代表多林种的试验区;②桉林地观测点,代表单一林种试验区;③光坡地观测点,代表植被破坏后无覆盖的试验区。这三个观测点,各有集雨区,地貌类型相似,在同一时间内观察降雨量、径流量、径流深和泥沙流失量。将观测资料进行整理、对比、分析,初步看出三个观测点的某些特征。光坡地显示了无覆盖区侵蚀的基本特征,桉林地、混交林地显示了不同植被保持水土的作用。这些观测资料,具有一定的实用价值和理论意义。观察点于1981年建立,1982年5月开始观测,观测时间短,发现的问题不一定是一种规律,但已显示出各点的基本特征。
I. INTRODUCTION In order to compare the effects of different forest types on soil and water conservation to prevent erosion, three observation points for runoff in small watersheds have been set up: ① observation points on mixed forests represent the experimental areas for multi-forest species; ② eucalyptus Observation points, on behalf of a single forest test area; ③ light slope observation points, on behalf of vegetation coverage after the test area is not covered. Rainfall, runoff, depth of runoff and sediment loss were observed at the same time in the three observation points, each with rain-collecting areas and similar types of landforms. The observation data are collated, compared and analyzed, and some features of the three observation points are initially seen. Light slope shows the basic characteristics of the erosion of uncovered areas, eucalyptus forest, mixed forest shows the role of different vegetation to maintain soil and water. These observations have a certain practical value and theoretical significance. The observation point was established in 1981, and the observation started in May 1982 with a short observation time. The problems discovered are not necessarily a law, but the basic characteristics of each point have been shown.