1) Ningxia Yellow River Water Irrigation District
宁夏平原引黄灌区
2) Ningxia irrigation area
宁夏引黄灌区
1.
The influence of digging well to combat drought on ecology of oasis in Ningxia irrigation area;
宁夏引黄灌区抗旱打井对绿洲生态的影响
4) irrigation channel in Ningxia
宁夏引黄灌渠
1.
It makes a brief introduction to option section of large-span aqueducts of irrigation channel in Ningxia,hydraulic calculation,aqueduct shell two-way prestress design,sidewall precast lifting,aqueduct pier,support and bored pile foundation design,precast and cast-in-situ construction control,etc.
对宁夏引黄灌渠大跨度渡槽的方案比选,水力计算,槽壳双向预应力设计,侧墙预制吊运、槽墩、槽台设计,钻孔灌注桩基础设计,预制与现浇施工控制等问题,作以概略说明,并依据施工流程进行结构分析,供设计单位在作类似结构设计时参考。
5) Ningxia Yellow-river irrigating region
宁夏黄河灌区
1.
Sample plots in villages and towns of Ningxia Yellow-river irrigating region.
通过在研究区布设标准地,统计蛀杆害虫的幼虫数、羽化孔数、刻槽数、受害株率以及危害高度、树高、树龄、树种,得出标准地5项指标:平均虫口、拥挤度、被害株率、感虫株率和抗虫株率,采用ISODATA动态聚类法,得出了蛀杆害虫危害状况分类及防治对策,为三北防护林工程蛀杆害虫的管理提供科学和理论依据,以促进宁夏黄河灌区生态和经济持续发展。
补充资料:宁夏平原
即“银川平原”(1049页)。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条