洪積說 的英文怎麼說
中文拼音 [hóngjīshuō]
洪積說
英文
diluvial hypothesis-
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?Teams who have modelled the climate in the area are warning of greatly reduced snowpacks and more intense flooding as temperatures inch up during the 21st century
對該地區氣候進行了模擬研究的科研小組警告說，在21世紀期間，隨著氣溫的逐漸上升，積雪場將大幅度減少，洪水泛濫將更為嚴重。A mathematic model is first introduced for optimizing the layout of flood - release structures in a high arch dam after an idea of the broad sense of construction costs for unit area gate is introduced, and the optimal computation of the layout of flood - release structures in xiao - wan arch dam demonstrates that this model is reasonable ; 4
在引入了閘門廣義單位面積造價的基礎上，首次建立了高拱壩壩身泄洪建築物布置的數學優化模型，並通過對小灣拱壩壩身泄洪孔口的優化布置計算，說明所提出的數學優化模型是可用的； 4( 4 ) by five terraces surrounding the ancient barrier lake, presuming that destroyed process of the ancient barrier lake is at least divided into five phases at the time span of two thousand years to three thousand years, and it reflects the five times flood in the course of the destroying of the ancient barrier lake
（ 4 ）依據古堰塞湖湖相沉積中存在的五級階地，說明古堰塞湖至少分為明顯的五個階段突發性消亡的，消亡的平均周期為2 3千年，並且反映了古堰塞湖消亡過程中五次洪水事件的發生。分享友人