gravity flood 中文意思是什麼
gravity flood
解釋
重力驅油-
The system skillfully takes advantage of the naturltopography and the eurved waterflowing pattern om the middle reach of the mingjiang river, thus combining water - bifurcation, flood - diversion, sand - dredging and water - controlling as a whole gravity irrigation system, which guarantees the chengdu plain a land of abundance
都江堰巧妙利用岷江出山口處的地形、水脈、水勢、乘勢利導,使堤防、分水、泄洪、排沙、控流相互依存,共為體系,保證了防洪、灌溉、水運和用水綜合效益的發揮,孕育了舉世聞名的「天府之國」 。 -
The soil erosion in typicalregions of loess plat eau are studied in this paper : ( 1 ) the main factors affecting soilerosi on are pre cipitation, topography and land use ; ( 2 ) the main erosion types arte watererosio n and gravity erosion ; ( 3 ) the soil erosion is mainly produced in flood season ; ( 4 ) the soil erosion vertically distributes regularly ; ( 5 ) soil erosion is heavy in suide, light relatively in tianshui, typicial in ansai, and exceptional in xife ng among fourstudied typical regions of loess plateau
對二龍山水庫上游流域水土流失狀況及自然植被情況等進行了調研,以喚起人們對土壤侵蝕狀況有一個明確的認識,根據生物的適宜性進行調整,充分發揮生物與環境的最高生產力,採取有效措施和對策防止土壤侵蝕之目的。
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