| 黔西北裸露岩溶地区水文地球化学特征对土地利用方式的响应研究 |
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| 引用本文： | 杨桂花,潘晓东,袁建飞,邓国仕,唐业旗.黔西北裸露岩溶地区水文地球化学特征对土地利用方式的响应研究[J].中国岩溶,2018,37(4):535-544. |
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| 作者姓名： | 杨桂花 潘晓东 袁建飞 邓国仕 唐业旗 |
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| 作者单位： | 1.中国地质调查局成都地质调查中心 |
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| 基金项目： | 基金项目：中国地质调查局地质调查项目(12120113052500、DD20160285)；国家自然科学基金项目(41502245) |
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| 摘 要： | 为了探讨不同土地利用方式下的水文地球化学特征与地下水循环演化的关系，文章选取贵州省毕节市典型农业区的农田、林地、草地灌木和建筑用地等四类土地利用方式，通过区域地质调查、遥感解译、水化学分析和图解方法，研究裸露岩溶地区其对地下水水化学组分的影响。结果表明:这四类土地利用区域地下水主要组分的浓度和主要矿物的饱和指数都呈差异性。此外，土壤易溶盐组分也随土地利用类型发生改变。并且发现，绝大多数样品中，土壤易溶盐组分浓度高于地下水中相同的组分。因此，降雨入渗补给条件下淋滤作用可导致土壤中易溶盐组分进入地下水中，进而影响地下水化学组分浓度的演化趋势。研究区域地下水均以HCO3-Ca型，HCO3-Ca-Mg型和HCO3-SO4-Ca型水为主，但是，受自然地理因素和人类活动的影响，地下水组分和水化学类型在不同土地利用类型区域中存在差异性。基于本研究建立了地下水演化的两种概念模型。
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| 关 键 词： | 岩溶地区 土地利用 地下水 水化学特征 人类活动 |
Response of hydrogeochemical characteristics to land-use modes in exposed karst areas of northwestern Guizhou Province |
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| YANG Guihu,PAN Xiaodong,YUAN Jianfei,DENG Guoshi and TANG Yeqi.Response of hydrogeochemical characteristics to land-use modes in exposed karst areas of northwestern Guizhou Province[J].Carsologica Sinica,2018,37(4):535-544. |
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| Authors: | YANG Guihu PAN Xiaodong YUAN Jianfei DENG Guoshi and TANG Yeqi |
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| Institution: | 1.Chengdu Center, China Geological Survey2.Institute of Karst Geology,CAGS/Key Laboratory of Karst Dynamics ,MNR＆GZAR/International Research Center on Karst under the Auspices of UNESCO |
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| Abstract: | Land use modes are important to assess the impact of human activity on the earth surface, especially in bare karst areas. The hydrogeochemical characteristics can be used in this assessment. This study was based on geological survey combined with remote sensing and hydrochemical analysis of groundwater. The purpose was to reveal the response of hydrogeochemistry to land-use modes in a typical karst agricultural region of Bijie city, Guizhou Province. The major land-use modes include farmland, woodland, grassland and construction land. It was found that there are differences in the concentrations of major ions of groundwater and SI (Saturation Index) values of dominant minerals for these four different land use modes. In addition, the contents of water-soluble salts of soil are higher than that of major ions of groundwater in almost all of samples, indicating that under the condition of rainfall infiltration recharge, the leaching of water-soluble salts can affect the concentrations of major ions in groundwater. Moreover, the dominant groundwater types are ofHCO3-Ca, HCO3-Ca-Mg, and HCO3-SO4-Ca in compositions for these four land-use modes. However, due to the influences of natural geographical factors and human activity, there are differences in the compositions and hydrochemical types for these four land-use modes. Based on these results, two conceptual models are established for the evolution of groundwater in the study area. |
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| Keywords: | karst area land use groundwater hydrochemical characteristics human activity |
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