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蓄水式和泄水式沟头防护工程有何异同?
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蓄水式和泄水式沟头防护工程有何异同?
时间:2021-12-27 16:16
关键词:
水土保持学
林学
答案解析
<p> 异:两种沟头防护工程建设所需条件不同,当沟头上部集水区较少时可采用蓄水式沟头防护工程,而泄水式沟头防护工程一般在下列情况下考虑修建:一当沟头集水面积大且来水量多是,沟梗已不能有效的拦蓄径流二受侵蚀的沟头临近村镇威胁交通二无条件或不允许采用蓄水式沟头防护时,必须把径流导至集中地点通过泄水建筑物排泄入沟底,还要有消能设施以免冲刷沟底。<br> 同:蓄水容量和泄水量都需根据沟头水文,地形条件及采水量而定。</p>
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