基于随机森林的黑河中游地下水埋深变化及成因

发布时间：2018-03-16 21:43

本文选题：黑河中游　切入点：地下水埋深　出处：《水土保持研究》2017年01期 　论文类型：期刊论文

【摘要】：研究黑河中游地下水埋深变化规律及其成因,可为该流域地下水合理开发利用提供参考。根据黑河中游33个观测井1985—2010年的地下水埋深资料,利用地统计学方法分析了地下水埋深变化规律;采用随机森林法研究了埋深变化的成因。结果表明:黑河中游地下水埋深自南向北减少;甘州区和临泽县的地下水埋深变化趋势分别在2001年和2004年前呈增大趋势,之后又逐年减小,高台县北部地区埋深呈持续减小趋势,而东部地区呈增大趋势;地统计学分析表明地下水埋深具有中等的空间相关性,且空间各向异性有增强的趋势;影响黑河中游地下水埋深变化的主要因素是渠系水利用系数、地下水开采量、地表水引用量及蒸发能力。
[Abstract]:Study on the middle reaches of Heihe groundwater depth variation and its causes, which can provide reference for the rational development and utilization of the groundwater in the middle reaches of Heihe basin. According to the 33 observation wells from 1985 to 2010 the groundwater depth data analysis of the groundwater depth variation using geostatistics method; using the random forest method to study the causes of change of depth results. Show that the depth of groundwater in the middle reaches of Heihe River from the south to the north of Ganzhou district and Linze County decreased; the groundwater depth changes respectively in 2001 and 2004 increased, then decreased year by year, north of Gaotai County depth is decreasing trend, while the eastern region showed an increasing trend; geostatistical analysis showed that the groundwater depth has the moderate spatial correlation, and spatial anisotropy has strengthened; main factors affecting the change of groundwater depth in the middle reaches of Heihe's water use coefficient of canal system, underground The amount of water mining, the amount of surface water and the capacity of evaporation.

【作者单位】：西北农林科技大学水利与建筑工程学院;
【基金】：国家自然科学基金(91425302;51279166)
【分类号】：P641.1

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