萬家寨水庫建成后上游河段冰情特性研究
發(fā)布時間：2018-08-17 11:07
【摘要】：為深入研究萬家寨水庫建成后上游河段的冰情變化規(guī)律及影響因素,并為防凌調度提供依據。根據1987—2015年黃河萬家寨上游河段的歷史實測冰情資料,統(tǒng)計分析了該河段的冰情特征以及萬家寨水庫運行后出現的新冰情,并對影響該河段冰情的河道形態(tài)、氣象條件、水庫調度和水力因素等方面進行了分析。研究表明,萬家寨上游河段冰情特征規(guī)律是:封河順序由庫區(qū)自下而上,封凍形式為平立封相交;開河時庫區(qū)立封河段及立封河段以下解凍較上游晚,以上河段由下游向上游開河,開河形式為文開、武開、半文半武。1998年萬家寨水庫運行后,河道形態(tài)及水力因素的改變,氣溫的升高導致冰情發(fā)生了明顯的變化,主要表現為:流凌、封河日期推遲,開河日期提前,不封凍河段變成穩(wěn)定封凍河段,封凍長度增加,封河期水位升高,冰塞冰壩險情增加。該研究對萬家寨水庫建成后上游河段冰情進行了全面的剖析,對制定合理的防凌減災方案具有重要意義。
[Abstract]:In order to deeply study the ice state variation law and influencing factors of the upstream reach of Wanjiazhai Reservoir after the completion of the reservoir, and provide the basis for anti-ice regulation. Based on the historical measured ice condition data of the upper reaches of Wanjiazhai River from 1987 to 2015, the ice regime characteristics of the reach and the new ice conditions after the operation of the Wanjiazhai Reservoir are statistically analyzed, and the river channel shape and meteorological conditions that affect the ice condition of the reach are analyzed. Reservoir operation and hydraulic factors were analyzed. The study shows that the ice regime characteristics of the upper reaches of Wanjiazhai are as follows: the sequence of river closure is from the bottom to the top of the reservoir area, and the freezing form is Pingli seal intersecting, and the thawing of the Lifeng reach and the lower reaches of Lifeng reach in the Kaihe reservoir area is later than that in the upper reaches. In the form of Wenkai, Wukai, and half-Wenjiazhai in 1998, after the operation of Wanjiazhai Reservoir, the changes of river channel shape and hydraulic factors, and the increase of air temperature, resulted in obvious changes in ice conditions. The main performance is that the river flow, the date of river closure is delayed, the date of opening river is advanced, the section without freezing is changed into a stable frozen reach, the length of the frozen river increases, the water level rises during the period of river closure, and the dangerous situation of ice slug ice dam increases. The study comprehensively analyzed the ice condition in the upper reaches of Wanjiazhai Reservoir after the completion of the reservoir, which is of great significance to the establishment of a reasonable plan for ice prevention and mitigation.
【作者單位】： 內蒙古農業(yè)大學水利與土木建筑工程學院;四川大學水力學與山區(qū)河流開發(fā)保護國家重點實驗室;黃委黃河水利科學研究院;
【基金】：國家自然科學基金(51369017;51569020) 內蒙古自然科學基金(2015MS0515) 黃河水利科學研究院基本科研業(yè)務費項目(HKYJBYW-2016-34)
【分類號】：TV875
[Abstract]:In order to deeply study the ice state variation law and influencing factors of the upstream reach of Wanjiazhai Reservoir after the completion of the reservoir, and provide the basis for anti-ice regulation. Based on the historical measured ice condition data of the upper reaches of Wanjiazhai River from 1987 to 2015, the ice regime characteristics of the reach and the new ice conditions after the operation of the Wanjiazhai Reservoir are statistically analyzed, and the river channel shape and meteorological conditions that affect the ice condition of the reach are analyzed. Reservoir operation and hydraulic factors were analyzed. The study shows that the ice regime characteristics of the upper reaches of Wanjiazhai are as follows: the sequence of river closure is from the bottom to the top of the reservoir area, and the freezing form is Pingli seal intersecting, and the thawing of the Lifeng reach and the lower reaches of Lifeng reach in the Kaihe reservoir area is later than that in the upper reaches. In the form of Wenkai, Wukai, and half-Wenjiazhai in 1998, after the operation of Wanjiazhai Reservoir, the changes of river channel shape and hydraulic factors, and the increase of air temperature, resulted in obvious changes in ice conditions. The main performance is that the river flow, the date of river closure is delayed, the date of opening river is advanced, the section without freezing is changed into a stable frozen reach, the length of the frozen river increases, the water level rises during the period of river closure, and the dangerous situation of ice slug ice dam increases. The study comprehensively analyzed the ice condition in the upper reaches of Wanjiazhai Reservoir after the completion of the reservoir, which is of great significance to the establishment of a reasonable plan for ice prevention and mitigation.
【作者單位】： 內蒙古農業(yè)大學水利與土木建筑工程學院;四川大學水力學與山區(qū)河流開發(fā)保護國家重點實驗室;黃委黃河水利科學研究院;
【基金】：國家自然科學基金(51369017;51569020) 內蒙古自然科學基金(2015MS0515) 黃河水利科學研究院基本科研業(yè)務費項目(HKYJBYW-2016-34)
【分類號】：TV875
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