天气预报 > 其他 > 逢弯去角逢正抽心是什么意思
逢弯去角逢正抽心是什么意思
更新时间: 2020-10-04 00:00:00  

“遇弯截角”指岁修时遇河流弯段,在凸岸截去沙滩角,在凹岸设挑流护岸工程,改变主流方向,使其顺直一些,减轻主流对凸岸的冲刷。

“逢正抽心”就是遇到顺直淤塞的河道,应当深挖清淤河床的中间部位,达到主流集中的目的,使江水“安流顺轨”避免冲毁河岸,毁坏农田。

“遇弯截角、逢正抽心”说的是都江堰的治河原则。

关键词: 什么 意思

逢弯去角逢正抽心是什么意思相关经验

天气预报

最新推荐

页面:/news/view-3030271/ | 耗时:0.6222 s | 内存:2.11 MB | 查询:4 | 缓存读取:3 写入:0 | 加载文件:25
select * from tbl_Articles WHERE ArticleID=3030271 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3030271 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3030271 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1079277,1075526,1048220,1069103,1066438,1063463,1073526,156284,1077182,1015145,1076267,986394,1066526,1044745,1073748,983947,1067795,1067207,1063717,1079493,1068782,1047083,1068212,1077868,1079442,1068222,1080817,1054380,1065331,1057545) ORDER BY field (ArticleID,1079277,1075526,1048220,1069103,1066438,1063463,1073526,156284,1077182,1015145,1076267,986394,1066526,1044745,1073748,983947,1067795,1067207,1063717,1079493,1068782,1047083,1068212,1077868,1079442,1068222,1080817,1054380,1065331,1057545)