| 引用本文: | 姚玲,杨洋,孙贯芳,等.基于地统计分析的河套灌区地下水埋深与矿化度时空变异规律[J].灌溉排水学报,2020,(5):-. |
| Yao Ling,Yang Yang,Sun Guanfang,et al.基于地统计分析的河套灌区地下水埋深与矿化度时空变异规律[J].灌溉排水学报,2020,(5):-. |
|
| 摘要: |
| 【目的】为了研究河套灌区地下水埋深和矿化度的时空变异规律。【方法】本文以内蒙古河套灌区为研究区域,应用地统计学方法和ArcGIS等工具分别研究了1998-2017年灌区地下水埋深和矿化度的时空变异性和空间分布及其影响因素。【结果】结果表明：1、从1998-2017年灌区地下水埋深及其空间变异性逐渐增大,地下水矿化度及其空间变异性先增大后减小。地下水埋深和矿化度的块金系数均较小,表明其主要影响因素为灌区的环境。地下水矿化度块金系数逐渐增大,空间结构性变差,受人为因素影响造成的随机变异性增强。地下水埋深及矿化度的空间自相关性距离逐渐增大,空间连续性逐渐增强；2、灌区西南部沿黄河附近埋深相对较浅,基本在2 m以下；西北部和东北部沿狼山山前相对较深,部分区域埋深可达10 m以上,机电井的分布与地下水埋深高值区域的分布相似。矿化度较高的区域分布在灌区西北部和东南部地区,西南及中部局部地区地下水矿化度较低；3、丰水年大量的降雨对灌区整体地下水的补给作用,使得丰水年地下水埋深较浅,地下水得到淡化使其矿化度减小。【结论】地下水矿化度较高的区域地下水埋深相对较小,地下水矿化度较低的区域地下水埋深相对较大。 |
| 关键词: 河套灌区;地下水埋深;地下水矿化度;地统计学;GIS;空间变异 |
| DOI： |
| 分类号:P641.2 |
| 基金项目:国家重点研发计划；国家自然科学基金 |
|
| The spatial and temporal variation rules of groundwater depth and salinity in Hetao Irrigation District based on geostatistics |
|
Yao Ling, Yang Yang, Sun Guanfang, Zhu Yan, Yang Jinzhong
|
|
The State Key Laboratory of Water Resource and Hydropower Engineering Science,Wuhan University
|
| Abstract: |
| 【Objective】For analyzing the spatial and temporal variation rules of groundwater depth and salinity and their impact factors in Hetao Irrigation Distract.【Method】This paper takes Hetao Irrigation District in Inner Mongolia as the research area by using geostatistics and GIS spatial analysis tools.【Result】The results showed that: 1.From 1998 to 2017, groundwater depth and its spatial variability increased gradually, while groundwater salinity and its spatial variability increased first and then decreased. The nugget coefficient of groundwater depth and salinity are small, which demonstrate that environmental factors are the major impact factors rather than human activities. The nugget coefficient of groundwater salinity increased gradually, which shows that the random variability caused by human factors increases. The spatial autocorrelation distance and spatial continuity of groundwater depth and salinity increased gradually. 2.The groundwater depth along the Yellow River in the southwest of the irrigated area is relatively shallow, while the northwest and northeast along the Wolf Mountains are relatively deep. The area with pumping Wells was found to own deeper groundwater depth. The areas with higher salinity are distributed in the northwest and southeast of the irrigated areas, while the groundwater salinity in the southwest and central region is lower. 3.In the wet year, great amount of recharge caused shallower groundwater depth, and lower groundwater salinity.【Conclusion】The groundwater depth is relatively shallow in regions with higher groundwater salinity, and relatively deep in regions with lower groundwater salinity. |
| Key words: Hetao Irrigation District; groundwater depth; groundwater salinity; geostatistics; GIS; spatial variation |
