Effect of developed rill formation accompanied with the variation of slope length on soil loss

发育的细沟随坡长变化对土壤流失的影响

基本信息

批准号：
05452326
负责人：
KUSAKA Tatsuro
金额：
$ 3.78万
依托单位：
Yamaguchi University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05452326/
关键词：
Rainfall Surface flow Soil erosion Artificial rainfall generator Gradient and length of a slop Rill formation

项目摘要

It is one of the factors for soil erosion that the washing out of soil particles from inclined bare fields is rill erosion. In the case of producing rill erosion, even if the intensity of rainfall and runoff ratio are the same, it is possible to produce a difference in total soil loss. It is inferred that complicated rill owing to rainfall in inclined bare fields influences the quantity of soil loss. The present stuby is aimed at grasping and classifying the form of developed rill by an indoor experiment in the changing length of slope (100cm, 150cm, 200cm) which considers the influence of the length of a alope in case of each form of developed rill. The indoor experiment proved that the rills are classified in types (I,Y,RY) by establishing a condition of the present study, the effects of the length of a slope involved in soil loss have a different tendency in each type.Results are as follows ;1) Soil loss and rill formations for surface water flow were surveyed using old and new type rainfall simulators.2) Rill formations occurred by surface water flow running dawn on the soil box under the dry density of the soil layler set constant condition were analyzed qualitatively and quantitatively.3) Basic relationship of rainfall, surface water flow and soil loss was clarified by collecting, arranging and analyzing the data of the experiment under same soil condition in the soil box.4) A Soil loss equation with regard to rainfall types was developed using results of experiment and observations of the rainfall simulator and the field test plots, and it was found that the equation showed good application to actual fields.

这是土壤侵蚀的因素之一，即从倾斜的裸露田地从土壤颗粒中洗涤是rill侵蚀。在产生RILL侵蚀的情况下，即使降雨量和径流的强度相同，也可能会产生总土壤损失的差异。可以推断，由于倾斜的裸露场的降雨，复杂的rill会影响土壤损失的数量。目前的顽强旨在通过室内实验抓住和分类开发的rill形式，以改变坡度的变化（100cm，150厘米，200cm，200厘米），该实验考虑了每种发达的rill形式的层长度的影响。室内实验证明，通过建立本研究的条件，将RILL分类为类型（I，Y，RY），涉及土壤损失的斜率长度的影响在每种类型的趋势中具有不同的趋势，如下所示； 1）使用旧降雨量的旧降雨量进行了旧类型的水流。 3）降雨，地表水流和土壤损失的基本关系通过收集，排列和分析在土壤盒相同土壤条件下实验的数据来阐明降雨量，土壤流量和土壤流失的基本关系。