[1]刘皓雯,秦 伟,高美荣,等.丘陵区典型小流域地下水化学特征与补给来源分析[J].山地学报,2019,(02):186-197.[doi:10.16089/j.cnki.1008-2786.000412]
　LIU Haowen,QIN Wei,GAO Meirong,et al.Chemical Characteristics and Recharging Rates in the Groundwater of Typical Small Watersheds in the Hilly Central Sichuan Basin, China[J].Mountain Research,2019,(02):186-197.[doi:10.16089/j.cnki.1008-2786.000412]
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丘陵区典型小流域地下水化学特征与补给来源分析()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2019年02期
页码:
186-197
栏目:
山地环境
出版日期:
2019-04-25

文章信息/Info

Title:
Chemical Characteristics and Recharging Rates in the Groundwater of Typical Small Watersheds in the Hilly Central Sichuan Basin, China
文章编号:
1008-2786-(2019)2-186-12
作者:
刘皓雯1; 2;  秦 伟3;  高美荣1;  陆 文1; 2;  唐家良1*
1.中国科学院、水利部成都山地灾害与环境研究所,成都610041; 2.中国科学院大学,北京100049; 3.中国水利水电科学研究院泥沙研究所,北京100049
Author(s):
LIU Haowen1; 2;  QIN Wei3;  GAO Meirong1;  LU Wen1;  TANG Jialiang1*
1. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041,China; 2. University of Chinese Academy of Sciences, Beijing 100049, China; 3.China Institute of Water Resources and Hydropower Research, Beijing 100049, China
关键词:
丘陵区;  水化学特征;  同位素;  地下水补给
Keywords:
hilly watershed;  water chemistry;  isotopes;  groundwater recharge
分类号:
P345
DOI:
10.16089/j.cnki.1008-2786.000412
文献标志码:
A
摘要:
川中紫色土丘陵区频发的季节性干旱严重制约区域农村经济和社会可持续发展。地下水是丘陵区农村居民饮用和灌溉的主要水源,但迄今该区域地下水补给循环过程的相关研究报道极少。本研究选取盐亭大兴小流域(480 hm2)为典型小流域进行综合水文观测与取样,比较了小流域内浅层地下水(2口泉水、14口井水)在不同覆被条件下雨季和旱季的水化学特征(包括D、18O)及水岩作用过程,并通过氯离子平衡法和二元混合模型法对比分析区域降水补给地下水规律。结果表明:(1)研究区内浅层地下水水化学类型为HCO3·SO4-Ca,主要控制因素为岩石风化水解;(2)由地下水同位素峰值响应特征可知该区域浅层地下水对雨季降水补给响应时间约为50～85 d; 雨季浅层地下水交换作用比旱季强烈;(3)氯离子平衡法受人为干扰较大,计算结果可能偏小,二元混合模型法未包含更多水源,计算结果可能偏大;(4)优化估算结果表明浅层地下水全年接受降水补给率在12%～38%间变化,雨季单次降水补给地下水比例在4.3%～58.0%间变化。本研究通过揭示丘陵区浅层地下水水化学性质变化规律,初步估算了浅层地下水补给来源及比例,可为区域地下水资源评估提供科学基础。
Abstract:
The frequent seasonal droughts impede the sustainable economic and social development in the hilly and rural area of central Sichuan Basin. Groundwater in the region is vital for drinking water supply and farming irrigation. However, there have been few relevant research on groundwater recycling process and recharge rates for central Sichuan Basin. In this study, Daxing watershed with an area of 480 ha was selected as case study to conduct integrated hydrological monitoring and sampling. The chemical properties and water-rock interaction processes were studied for the shallow groundwater bodies(including 2 springs and 14 wells)under different land covers during rainy and dry season, respectively. By comparing the chloride ion balance method with the two-component mixing model method using18O tracers, the recharging characteristics of groundwater in the region was interpreted. The results showed that chemical type of shallow groundwater was HCO3·SO4-Ca, which was mainly controlled by weathering and hydrolysis of rocks. It was confirmed that in the isotopic peaking signal of groundwater responding to rainfall water that recharging cycles of shallow groundwater in rainy season lasted about 50～85 days. The interaction processes in rainy season were stronger than those in dry season. The chloride ion balance method might relatively underestimated the values due to human interferences, whereas the mixing model method might make overestimation because only two major sources were considered. It suggested by the optimized estimation that the annual average recharging rates of shallow groundwater by precipitation ranged from 12% to 38%, and the rainfall recharging rates for each single rainfall events ranged from 4.3%% to 58.0%. By revealing the water chemistry dynamic of shallow groundwater in hilly area, this study preliminarily identified the groundwater recharge sources and estimated the recharging rates in a typical hilly area, and provid a scientific basis for further regional assessment of groundwater resources.

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备注/Memo

备注/Memo:
收稿日期(Received date):2018-09-21; 改回日期(Accepted date):2019-1-23
基金项目(Foundation item):国家科技重大专项“水体污染控制与治理”(2017ZX07101001-02); 水土保持生态效应监测与评价技术研究(201501045); 中国科学院关键技术人才项目。[National Major Science and Technology Program for Water Pollution Control and Treatment(2017ZX07101001-02); Study on Monitoring and Evaluation Technology of Ecological Effects of Soil and Water Conservation(201501045); Key Technology Talents Project of Chinese Academy of Sciences]
作者简介(Biography):刘皓雯(1994-),女,四川乐山人,硕士研究生,研究方向为流域水文学与环境科学。[LIU Haowen(1994-), female, born in Leshan, Sichuan province, M.Sc. candidate, research on watershed hydrology and environmental science] E-mail:904455534@qq.com
*通讯作者(Corresponding author):唐家良(1975-),男,四川隆昌人,博士,研究员,研究方向为土壤地理与流域水文研究。[TANG Jialiang(1975-), male, Ph.D., professor, specialized in Soil Geography and Watershed Hydrology] E-mail: jltang@imde.ac.cn
更新日期/Last Update: 2019-03-30