本文選題：龍灘水庫 + 汛期分期�。� 參考：《廣西大學(xué)》2014年碩士論文

【摘要】：論文在分析龍灘流域暴雨洪水季節(jié)性變化規(guī)律的基礎(chǔ)上,以龍灘水庫汛期的合理分期及分期汛限水位的調(diào)整為主題,圍繞龍灘水庫汛期分期的可行性及必要性、汛期的合理分期、分期設(shè)計洪水的推求、各分期汛限水位的調(diào)整、分期后的風(fēng)險及效益分析等方面展開研究,使水庫調(diào)度運行更符合龍灘流域的暴雨洪水特性和變化規(guī)律,在不增加水庫防洪風(fēng)險的基礎(chǔ)上,合理、科學(xué)地優(yōu)選汛限水位以達到增加水庫蓄水,實現(xiàn)洪水資源化、緩解供水期水資源緊缺矛盾的目的。論文從汛期的定義出發(fā),對龍灘水庫的汛期進行了劃定。分別采用降雨量和徑流量為指標因子,運用分形分析方法對龍灘水庫進行汛期分期研究,最后結(jié)合龍灘水庫自身要求得到相對精確合理的汛期分期結(jié)果：前汛期(4月12日～5月31日)、主汛期(6月1日～8月31日)和后汛期(9月1日～11月9日)。在汛期分期方案的基礎(chǔ)上,采用分期最大值跨期選樣方法及P-Ⅲ型曲線的適線法推求汛期各分期設(shè)計洪水。以汛期分期設(shè)計洪水成果為基礎(chǔ),采用典型年法推求各分期設(shè)計洪水過程線,按照龍灘初步設(shè)計調(diào)度規(guī)則和流域防洪目標進行調(diào)洪演算,確定在僅考慮龍灘水庫自身防洪要求時的防洪限制水位。最后考慮龍灘汛期不同分期流域下游防洪對龍灘防洪庫容的需求,得到水庫各分期的最終汛限水位：主汛期6月1日至7月15日的防洪限制水位為361.87m,7月16日至8月31日的防洪限制水位為368.40m,后汛期9月1日至11月9日的防洪限制水位為378.45m。論文最后對水庫分期汛限水位調(diào)整的風(fēng)險和效益進行分析和評估,得出水庫汛限水位調(diào)整后并不增加水庫防洪風(fēng)險,且可增加相應(yīng)發(fā)電效益2.28億元及供水量10.47億m3的結(jié)論,證明了汛限水位調(diào)整方案的可行性。
[Abstract]:On the basis of analyzing the seasonal variation of rainstorm and flood in Longtan Basin, this paper focuses on the feasibility and necessity of flood season staging in Longtan Reservoir, taking the reasonable stages of flood season and the adjustment of flood limit water level as the themes. The reasonable stages of flood season, the deduction of design flood, the adjustment of the limited water level of each flood season, the risk and benefit analysis after the stages, etc. are carried out to make the operation of the reservoir more in line with the characteristics and variation law of rainstorm and flood in Longtan basin. On the basis of not increasing the risk of reservoir flood control, reasonable and scientific optimization of flood limit water level is carried out to increase reservoir water storage, realize flood resource utilization and alleviate the contradiction of water resources shortage during water supply period. Based on the definition of flood season, the flood season of Longtan Reservoir is defined. Using rainfall and runoff as index factors, the flood season of Longtan Reservoir was studied by using fractal analysis method. Finally, according to the requirements of Longtan Reservoir, the results of flood season period are relatively accurate and reasonable: the former flood season (April 12 ~ 31 May), the main flood season (June 1 to August 31) and the later flood season (September 1 ~ November 9). Based on the scheme of flood season, the design flood of flood season is calculated by using the method of selecting the maximum value of the period and the fitting line method of P- 鈪，

本文編號：1828526