降河魚 的英文怎麼說
中文拼音 [jiànghéyú]
降河魚
英文
catadromous fish-
A 2 - d hydrodynamic - numerical model was applied to typical rocky rapids called jiyutan by comparing different computational models. based on the comparison of different schemes, the change of the discharge and the flow current in a branch were analyzed, and the relationship between the flow condition and excavation area, scope as well as mode was discussed, the conclusions show : ( 1 ) in a branching rocky rapids, the velocity may be reduced and flow condition can be improved by excavating one channel partly
本文在對各種數學模型比較的基礎上，應用二維水動力數學模型研究典型石質汊流灘? ?廣西潯江鯽魚灘航道整治工程方案，通過各方案計算結果比較，分析了不同汊道的開挖及汊道內不同開挖面積、開挖范圍以及開挖方式所引起的分流比及工程區域航道水力條件的變化規律，研究結果表明： （ 1 ）對于石質汊流灘來說，在某一汊道通過局部開挖河槽，擴大過水斷面面積，可以達到降低工程段流速、改善局部水流條件的目的。Based on the daily and hourly precipitation observation and daily soil moisture observation in meishan, nianyushan and jiangji station in shiguanhe river catchment over the huaihe river basin in summer of 1998 and 1999, the temporal variations of the precipitation and soil moisture of this three stations and their relationship are analyzed in this study
本文首先利用1998 、 1999年淮河地區史灌河流域夏季逐日降水資料，逐小時降水資料和梅山、鯰魚山、蔣集站的土壤濕度觀測資料，對三個站的土壤濕度和降水隨時間的變化趨勢及它們之間的相互關系進行分析。Parts of some smaller london rivers are dry, and the environment agency warned low flows could cause mass fish deaths and problems for boats getting up the thames
英國環境保護部門對此發出警告說，水位的大幅度下降有可能造成河內魚群的大量死亡，同時過低的水位也會危及在泰晤士河上行船隻的安全。
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