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water jump (越野賽馬中的)水溝。

water lettuce

Using the model experiment data , the authors calculate the decreased percentage of water jump length , unit width hydraulic jump volume and the water depth downstream of the jump ; and also calculate the energy dissipation rate of dentoid baffle , it is concluded that the device of dentoid baffle can increase the energy dissipation rate of hydraulic jump theory and decrease the engineering cost 計算了新增齒墩設施的消能量,同時計算了新增齒墩設施的躍后水深、水躍長度和單寬水躍容積減少的百分數。結果表明,采用齒墩設施,可增進消能作用,并取得顯著的經濟效益,達到附加射流水躍理論所預期的效果。

What ' s more , we put forward some experienced formulas on the basis of the cortical analysis . the result of the research show that by installing diffluent piers with low ridge , we can eliminate the root of oscillatiny water jump , perfect the energy dissipation effect of water jump , also , we can improve the flow condition of down - stream . the fact that the main flow of down - stream is in the middle , not only effectively lower the speed of the bottom flow in the ridge rear , alleviate the erosion to the river bed , but also avoid the heavy wave resulted from the main flow in the surface , thus improve the surface wave of down - stream obviously . we can work out the body style parameters of diffluent piers with low ridge according to the project flow condition and experience formulas , and then reckon the down - stream surface wave condition for the protected building of the down - stream bank 研究結果表明:設置低坎分流墩后,消除了擺動水躍水舌擺動的根源,提高了水躍的消能效果,改善了下游水流流態。下游水體的主流在中部,既有效的降低了坎后水流底流速,減輕水流對河床的沖刷,又避免了主流位于表面導致波浪過大的結果,下游的水面波浪明顯得到削減。依據經驗公式,可根據工程水流條件設計出低坎分流墩的體型參數,進而估算出下游沿程的水面波浪,為下游岸邊的砌護提供依據。

Around the shade around , emeishan from the spring down on the stone , such as color sure , it may emerald pearl inlay , water jump pentium , acoustic jubilant singing , and the hospitality of the people of the emeishan welcome to the guests all over 四周綠蔭環繞,峨眉山泉從石上流下,色如白練,似明珠鑲翡翠,水花跳躍奔騰,水聲歡快歌唱,代表著熱情好客的峨眉山人歡迎著來五湖四海的賓客。

Signs of water jumped out almost immediately , and just six weeks after opportunity landed , nasa held a press conference in washington to announce definitive proof that water once existed on mars 水的遺跡幾乎立刻躍入眼簾, “機遇號”著陸僅僅6周后, nasa就在華盛頓舉辦記者招待會,向外界公布了火星曾經有水的確鑿證據。

The cup shaked himself strongly , the water jumped out of his heart at last , the cup felt very happy . suddenly , he fell off on the ground 杯子奮力一晃,水終于走出了杯子心里,杯子好開心,突然,杯子掉在了地上。