洱海近岸菜地浅层地下水动态变化特征及影响因素

研究洱海近岸菜地浅层地下水埋深是合理调控浅层地下水位和防止土壤氮磷随浅层地下水流失的基础。通过对洱海近岸菜地2 a（2014年6月—2016年5月）浅层地下水埋深进行监测,分析了浅层地下水埋深的时空变化特征和影响因素。结果表明,洱海近岸菜地5个高程浅层地下水埋深均服从正态分布,其平均值为25.21~45.07cm,变异系数在0.26~0.43之间。浅层地下水埋深旱季深、雨季浅,其月变化和雨、旱季不同期,存在滞后现象,雨季浅层地下水埋深变异系数大于旱季。旱季和雨季浅层地下水埋深空间变化随等高线均呈不规则带状分布。洱海水位、降雨、灌溉、潜水蒸发和土壤物理特性的空间变异均是影响洱海近岸菜地浅层地下水...

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Bibliographic Details
Published inGuanʻgai paishui xuebao Vol. 36; no. 12; pp. 101 - 109
Main Author 杨艳鲜;张丹;雷宝坤;刘宏斌;翟丽梅;毛妍婷;冯光恒;陈安强
Format Journal Article
LanguageChinese
English
Published Xinxiang City Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage 2017
Subjects
Coefficient of variation
Dry season
Evaporation
Groundwater
Groundwater data
Groundwater levels
Hydrologic data
Irrigation
Lakes
Leaching
Normal distribution
Physical properties
Rainfall
Rainy season
Seasons
Soil formation
Soil permeability
Soil physical properties
Soil properties
Spatial variations
Vegetables
Water depth
Water level fluctuations
Water levels
Water resources
Water table
影响因素
时空变化
洱海
浅层地下水埋深
菜地
Online AccessGet full text
ISSN1672-3317
DOI10.13522/j.cnki.ggps.2017.12.017

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Summary:研究洱海近岸菜地浅层地下水埋深是合理调控浅层地下水位和防止土壤氮磷随浅层地下水流失的基础。通过对洱海近岸菜地2 a（2014年6月—2016年5月）浅层地下水埋深进行监测,分析了浅层地下水埋深的时空变化特征和影响因素。结果表明,洱海近岸菜地5个高程浅层地下水埋深均服从正态分布,其平均值为25.21~45.07cm,变异系数在0.26~0.43之间。浅层地下水埋深旱季深、雨季浅,其月变化和雨、旱季不同期,存在滞后现象,雨季浅层地下水埋深变异系数大于旱季。旱季和雨季浅层地下水埋深空间变化随等高线均呈不规则带状分布。洱海水位、降雨、灌溉、潜水蒸发和土壤物理特性的空间变异均是影响洱海近岸菜地浅层地下水埋深变化的主要因素。其中,1 966 m高程浅层地下水埋深与洱海水位极显著线性相关（p〈0.01）,二者互为连通,相互补给;其他高程浅层地下水埋深与降雨量和灌溉量显著线性相关（p〈0.05）,随降雨量增加,浅层地下水埋深逐渐变浅,随潜水蒸发量和灌溉量增加,浅层地下水埋深逐渐变深。距洱海由近及远土壤母质为河湖相沉积物到第四纪红黏土,使得不同发生层土壤渗水性由强变弱,造成离洱海越远,海拔越高,浅层地下水埋深越浅,变幅越小。
Bibliography:Understanding the dynamics of shallow groundwater table in the nearshore vegetable field of the Erhai Lake was essential for regulating groundwater resources and preventing nitrogen and phosphorus leaching. Based on groundwater data measured from June 2014 to May 2016 in the nearshore vegetable field, we analyzed the dynamics of the groundwater depth and the factors affecting it. The results showed that the shallow groundwater depth at different elevations showed a normal distribution and the average depth of shallow groundwater table was from 25.21 cm to 45.07 cm with variation coefficient of 0.26 to 0.43. The shallow groundwater depth was deeper in the dry season than in the rainy season, and its monthly variation in the rainy reasons differs from that in dry reasons, characterized by a hysteresis. The variation coefficient of the shallow groundwater depth in the rainy season was greater than that in the dry season. The spatial variation of the shallow groundwater depth showed irregular distribution. The wa
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ISSN:1672-3317
DOI:10.13522/j.cnki.ggps.2017.12.017