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谷坊的类型,如何计算谷坊水平间距?
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谷坊的类型,如何计算谷坊水平间距?
时间:2021-12-27 16:16
关键词:
水土保持学
林学
答案解析
谷坊的类型:<br>按建筑材料分:<br>土谷坊、石谷坊、植物谷坊;按使用年限:永久性谷坊、临时性谷坊;按透水性质分:透水性谷坊、不透水性谷坊;<br>计算:<br>谷坊间距与谷坊高度及淤积泥沙表面的临界不冲坡度有关,根据谷坊高度H,沟底天然坡度I,以及谷坊坝后於土表面稳定坡度I0。按下式计算:L=H/(I-I0)
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