简述拦砂坝的作用。 -题库考试答案搜索网

简述拦砂坝的作用。

问答题

2022-11-21 16:54

查看答案

正确答案

1.拦蓄泥沙调节沟道内水砂，以免除泥沙对下游的危害。
2.提高坝址处得侵蚀基准，减缓坝上游淤积段河床比降，加宽了河床并使流速和流深减小，从而大大减小水流的侵蚀能力。
3.因沟道流水侵蚀作用而引起的沟岸滑坡，其剪出口往往位于坡脚附近，拦砂坝的淤积物掩埋了滑体剪出口，对滑坡运动产生阻力，促进使滑坡稳定，减小泥石流的冲刷及冲击力，防止溯源侵蚀，抑制泥石流发育规模。

试题解析

标签：水土保持学林学

感兴趣题目

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

When loading or discharging dry mud or cement，crew members should use goggles and（）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

简述水土保持的意义和作用。

拦砂坝

简述拦砂坝的作用。

简述拦砂坝的坝址选择。

简述按结构分，拦砂坝的坝形种类几各自特点。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

相关题目: boost的意思是:help or encourage to increase or improve; eloquent的意思是:fluent or persuasive in speaking or writing; A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.; OR指令的作用是:( ); OR指令的作用是:( ); OR指令的作用是:( ); OR指令的作用是:( ); 简述造林密度对水土保持作用的影响。; 简述山区水土保持小流域综合治理的作用。; 简述水土保持林的作用与功能。; （）any case or suspected case of quarantinable disease，or any case of eruptive disease or any death be discovered，the local quarantine officer must be notified immediately．; Should any case or suspected case of quarantinable disease，or any case of eruptive disease or any death be discovered，the local Quarantine Officer must be（）immediately.; Masters are（）solely responsible for all damages or accidents of whatever kind resulting from the navigating or handling of their vessels by day or by night.; 系统中雷达状态包括Unknown、Operational（or ON）、Failed（or OFF）、Detached。; The carrier is liable for loss of or damage to the goods or delay in delivery caused by fire，（）the claimant proves that the fire arose from fault or neglect on the part of the carrier，his servants or agents.; Shutdown price（or point，or rule）停业价格（或停业点、停业原则）; 翻译：With Average or With Particular Average（WA or WPA）（）; 简述布尔算符（OR）的作用。; OR指令的作用是: 。( ); Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

广告位招租WX:84302438

题库考试答案搜索网

免费的网站请分享给朋友吧