1) sandy land control in Yongding river watershed
大兴永定河沙地治理
2) Yongding River sand land
永定河沙地
1.
The threshold velocity for transportation of sand, roughness, windblown sediment, wind-sand flow structure, soil mechanic composition and wind erosion amount were studied in 4 different land-use types (field land, forest land, wild grass land, flood land) in the Yongding River sand land in Beijing.
选取北京市永定河沙地4种不同土地利用类型(耕地、林地、荒草地、河滩地)作为试验地,对不同下垫面的起沙风速、下垫粗糙度、输沙量、风沙流结构、土壤机械组成、土壤风蚀量进行研究。
4) sandy governance
治理沙地
1.
iaeve as an excellent fixing pioneer plant and forage shrub has great value for the sandy governance and the development of animal husbandry in desertified areas.
羊柴是优良的固沙先锋植物和饲用灌木,对治理沙地、发展沙区畜牧业具有重要意义。
5) harnessing silted Yellow River
治理黄河泥沙
6) sediment treatment of the Yellow River
黄河泥沙治理
补充资料：大兴郡
大兴郡
后魏置，西魏改曰五原，寻复为大兴郡，后改曰盐州，在今宁夏盐池县。
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