river-made lake 中文意思是什麼
river-made lake
解釋
河成湖-
Abstract : this paper analyzes causal factors of flood in the middle reaches of changjiang river. due to neglection of environmental management, soil erosion in the upper and middle reaches of the changjiag river, lake sedimentation, large - scale reclamation of marshes, the flood regulation capacity of the lake was descended, and flood stage was risen and prolonged. consequently more and more river levees and lake dikes were reinforced almost every year to prevent the disasters, which made flood level go up and flood period last for more days. the frequency of flood and waterlogging disasters rose and their damage was enlarged. several proposals for flood prevention including agricultural modernization are put forward
文摘: 1998年長江大洪水后開始實施的「平垸行洪，退田還湖」的土地利用調整方案，從長遠來說應尋求農業安全且收入逐漸提高條件下的土地利用，長江中游地區應積極推進農業現代化，提高農業勞動生產率，轉移，減少分蓄洪區的人口，移民建鎮，對區內的土地要促進其規模經營，由優秀的有文化的農民經營，平時只有少量的直接從事農業生產的經營管理人員，農忙時則大量地使用季節性合同工或實現機械化，大洪水時退田還湖，減輕長江幹流大洪水的壓力，減少分洪與特大洪災時的損失，這樣還可促進避洪、冬季農業等的發展，也有利於長江中上游地區陡坡耕地的退耕還林，還可在糧食充足時進行休耕，在旱災、糧食緊張時擴大糧食生產? -
Lake mead is a man - made body of water fed by the colorado river
密德湖是個人造湖，湖水引自科羅拉多河。 -
The study analyses results of former schoiars made, carried out convey along main patch and correlate lake ; made experiments of catching and means, and captured from qindeli in middle river of heilongjiang to raohe of wusuli river ; made biological analysis of the captured fish ; finished the artificial fertilization. the results of the experiment below : 1
本研究綜合分析以前學者對黑龍江魴研究的結果，在重點江段和湖泊進行了資源調查；設計了采捕設備和方法，在黑龍江中游勤得利至撫遠江段和烏蘇里江饒河江段進行采捕；對采捕到的黑龍江魴進行生物學研究；並進行了黑龍江魴的人工繁殖。 -
The main features in the study of flood forecasting and control system are as follows : ( 1 ) runoff generating and confluence theory and hydro - dynamic method are adopted to predict the water level of taihu lake and key nodes, the basin wide forecasting and control system with the function of real time correction has been first established in plain river network to meet the complicated flow conditions of taihu lake basin and to enhance the reliability of forecasting results ; ( 2 ) according to the rainfall in foreseen period multiple schemes can be made in the forecasting model and adjusted with time, which overcomes the errors caused by the uncertain rainfall in the foreseen period so as to make the forecasting results approach reality
本文所研究的預報調度系統有如下特點： （ 1 ）本系統採用產匯流理論和水動力學方法預報太湖及重要節點水位，首次在平原河網地區建立了具有實時校正功能的全流域預報調度系統。以適合太湖流域復雜的水力條件，增強預報的可靠性; （ 2 ）預報模型可以根據預見期降雨量進行多方案預報，並隨時間推移，可以實時進行調整，克服由於預見期降雨不確定引起的誤差，使預報結果更接近實際。 -
Shengtuo oil field is a reservoir that it is made up of a series interstratified sedimentary rock, include sand formation and clay formation. sedimentary system has lake facieses, river facieses, delta facieses and so on. the shape of reservoir is very complicated
勝坨油田為一套砂、泥巖間互的湖泊、河流?三角洲相沉積儲集層，儲層形態復雜，縱向和平面上儲層物性變化大，非均質性嚴重。
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