万家寨水库建成后上游河段冰情特性研究
发布时间：2018-08-17 11:07
【摘要】：为深入研究万家寨水库建成后上游河段的冰情变化规律及影响因素,并为防凌调度提供依据。根据1987—2015年黄河万家寨上游河段的历史实测冰情资料,统计分析了该河段的冰情特征以及万家寨水库运行后出现的新冰情,并对影响该河段冰情的河道形态、气象条件、水库调度和水力因素等方面进行了分析。研究表明,万家寨上游河段冰情特征规律是:封河顺序由库区自下而上,封冻形式为平立封相交;开河时库区立封河段及立封河段以下解冻较上游晚,以上河段由下游向上游开河,开河形式为文开、武开、半文半武。1998年万家寨水库运行后,河道形态及水力因素的改变,气温的升高导致冰情发生了明显的变化,主要表现为:流凌、封河日期推迟,开河日期提前,不封冻河段变成稳定封冻河段,封冻长度增加,封河期水位升高,冰塞冰坝险情增加。该研究对万家寨水库建成后上游河段冰情进行了全面的剖析,对制定合理的防凌减灾方案具有重要意义。
[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.
【作者单位】： 内蒙古农业大学水利与土木建筑工程学院;四川大学水力学与山区河流开发保护国家重点实验室;黄委黄河水利科学研究院;
【基金】：国家自然科学基金(51369017;51569020) 内蒙古自然科学基金(2015MS0515) 黄河水利科学研究院基本科研业务费项目(HKYJBYW-2016-34)
【分类号】：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.
【作者单位】： 内蒙古农业大学水利与土木建筑工程学院;四川大学水力学与山区河流开发保护国家重点实验室;黄委黄河水利科学研究院;
【基金】：国家自然科学基金(51369017;51569020) 内蒙古自然科学基金(2015MS0515) 黄河水利科学研究院基本科研业务费项目(HKYJBYW-2016-34)
【分类号】：TV875
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