季节性冻融区地下水位预测方法研究

刘佳帅; 杨文元; 郝培净; 于 健; 杨金忠

引用本文:	刘佳帅,杨文元,郝培净,等.季节性冻融区地下水位预测方法研究[J].灌溉排水学报,2017,36(6):.
	LIU Jiashuai,YANG Wenyuan,HAO Peijing,et al.季节性冻融区地下水位预测方法研究[J].灌溉排水学报,2017,36(6):.

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季节性冻融区地下水位预测方法研究
刘佳帅，杨文元，郝培净，于健，杨金忠
武汉大学水资源与水电工程科学国家重点实验室，武汉 430072；内蒙古水利科学研究院，呼和浩特 010020

摘要:

为预测河套灌区冻融区全年地下水位变化过程，采用统计学方法，研究了冻融期地下水位与地表气温间的关系，建立了二者间的线性模型，结合非冻融期水量均衡模型，建立了改进型水量均衡模型，通过优化求解方法确定模型参数。结果表明，模型计算埋深与实测埋深拟合效果较好，提出的改进型水量均衡模型可较好地预测冻融区全年地下水位变化过程，解决了冻融期间地下水模拟难题，方法简单精确，具有很好的实用性。

关键词: 冻融期；气温；线性模型；改进型水量均衡模型；优化求解

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Predicting Change of Groundwater Table in Seasonal Permafrost

LIU Jiashuai, YANG Wenyuan, HAO Peijing, YU Jian, YANG Jinzhong

The State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China; The Inner Mongolia Institute of Water Resources and Conservancy Research, Hohhot 010020, China

Abstract:

This paper proposed a statistical model to predict groundwater table in seasonal permafrost in Hetao Irrigation District of Inner Mongolia. We linked the groundwater table to surface air temperature, and a linear relationship was found between them based on long-term experimental data. This, incombination with a water balance model for non-frozen seasons, provided a modified model to analyze water balance in permafrost. The model parameters were obtained by optimization using data measured in both frozen and non-frozen seasons. Comparisons between calculated and measured groundwater tables showed that the proposed model is able to predict change of groundwater table in both freezing and thawing seasons reasonably well. The model is simple and accurate for practical applications.

Key words: freezing and thawing period; air temperatures; linear model; improved water balance model; optimization