摘要
全球气候的变暖致使冰湖溃决灾害频繁发生,严重威胁高原地区人民生命财产安全。冰湖库容量作为冰湖研究基础参数,对冰湖危险性评价、冰湖溃决洪峰流量等具有不可代替的作用,准确的库容计算对最终结果具有重要控制作用。而传统计算冰湖库容的计算方法是基于大量冰湖参数与冰湖库容的统计关系,其相关性只能衡量冰碛湖面积和冰碛湖库容在统计规律上的一致性,对于精确计算冰碛湖库容仍有难以完成。因此通过文献资料整理、结合实地考察对湖盆形态模拟分析,将典型冰碛湖湖盆分为三段,通过模拟建立数学模型,以冰湖面积为约束条件,抽象成数学中的曲面立体模型,分别计算其形态体积,由此推算出以冰碛湖湖宽和湖长为变量的冰湖体积表达式,并利用龙巴萨巴冰湖进行案例验算,验证了公式的有效精确性,该公式为喜马拉雅山地区冰碛湖库容计算提供理论参考。
Global climate warming caused lake dam disasters occur frequently, a serious threat to people’s life and property safety in plateau area, the lake database is as lake research foundation parameters, on the frozen lake risk assessment, lake dam flood peak flow and so on has the effect that cannot replace, capacity of the accurate calculation of the final result has an important control function. However, the traditional calculation method of glacial lake capacity is based on the statistical relationship between a large number of glacial lake parameters and glacial lake capacity, and its correlation can only measure the consistency of the area of moraine lake and the volume of glacial lake in statistical laws. It is still difficult to calculate the volume of glacial lake accurately. Therefore the literature sorting, through simulation analysis, combined with field trips to lake basin form typical moraine lake lake basin can be divided into three parts, through the simulation mathematical model is set up, with lake area as constraint conditions, the abstract into the surface of the three-dimensional model, calculate its shape volume, thus calculated to moraine lake lake lake and lake long as variables volume expression, and use the dragon case and checking calculation of Barcelona, frozen lake, to verify the effective accuracy formula, the formula for the Himalayan region moraine lake capacity calculation to provide theoretical reference.
作者
周路旭
刘建康
李元灵
ZHOU Lu-xu;LIU Jian-kang;LI Yuan-ling(Institute of Exploration Technology,Chinese Academy of Geological Sciences,Chengdu 611734,China;China University of Geosciences(Beijing),Beijing 100083,China;Geological Hazard Prevention and Control Technology Center of China Geological Survey,Chengdu 611734,China)
出处
《科学技术与工程》
北大核心
2020年第24期9804-9809,共6页
Science Technology and Engineering
基金
中国地质调查局项目(DD20160279,DD20190644,20190505)
第二次青藏高原综合科学考察研究(2019QZKK0902)
国家自然科学基金(41402315)。
关键词
冰碛湖
库容
积分
数学模型
moraine dammed lake
reservoir capacity
integral
mathematical model
