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引用本文:杨平恒,詹兆君,明晓星,陈峰,任娟,邓书金,洪爱花.旅游酒店排污影响下的岩溶地下水水化学变化.湖泊科学,2019,31(2):416-428. DOI:10.18307/2019.0211
YANG Pingheng,ZHAN Zhaojun,MING Xiaoxing,CHEN Feng,REN Juan,DENG Shujin,HONG Aihua.Hydrochemical variation of the karst groundwater impacted by the contaminant discharge from a tourism hotel. J. Lake Sci.2019,31(2):416-428. DOI:10.18307/2019.0211
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旅游酒店排污影响下的岩溶地下水水化学变化
杨平恒1, 詹兆君1, 明晓星1, 陈峰1, 任娟1, 邓书金2, 洪爱花2
1.西南大学地理科学学院, 岩溶环境重庆市重点实验室, 自然资源部岩溶生态环境-重庆南川野外基地, 重庆 400715;2.重庆地质矿产勘查开发局南江水文地质工程地质队, 重庆市地下水资源利用与环境保护实验室, 重庆 401121
摘要:
岩溶地下水系统具有高度的开放性和脆弱性,使得地下水极易遭受污染.为探究旅游酒店排污对岩溶地下水水化学变化的影响,以金佛山世界自然遗产地水房泉流域为例,对水房泉地下水的水化学进行自动化监测,对流域内雨水、土壤水、某酒店自来水、污废水进行定期采集,结合流域硝酸盐氮氧同位素分析.结果表明,监测期间水房泉水化学变化随酒店入住游客量总体表现为3个阶段:前期受降雨影响显著,旅游高峰期间水质急剧恶化,后期水质明显好转.酒店生活污废水的排放成为水房泉水化学演变的重要因素,硝酸盐氮氧同位素表明水房泉的NO3-主要来自粪便、污废水以及土壤N的混合.H2SO4及污水中HCl、有机酸等可能参与了碳酸盐岩的溶蚀,使水房泉Ca2+、Mg2+、HCO3-浓度增加明显.流域岩溶管道发育,地下水流速快,使污染物质扩散迅速,故在研究期间水房泉主要离子的浓度高峰对污废水排放高峰的响应仅滞后约4 d.
关键词:  酒店排污  岩溶地下水  水化学特征  氮氧同位素  金佛山  水房泉
DOI:10.18307/2019.0211
分类号:
基金项目:国家自然科学基金项目(41103068)和中央高校基本科研业务费专项(XDJK2018AB002)联合资助.
Hydrochemical variation of the karst groundwater impacted by the contaminant discharge from a tourism hotel
YANG Pingheng1, ZHAN Zhaojun1, MING Xiaoxing1, CHEN Feng1, REN Juan1, DENG Shujin2, HONG Aihua2
1.School of Geographical Sciences, Southwest University, Chongqing Key Laboratory of Karst Environment, Field Scientific Observation & Research Base of Karst Eco-environments at Nanchuan in Chongqing, Ministry of Natural Resources of the People's Republic of China, Chongqing 400715, P. R. China;2.Laboratory of Chongqing Groundwater Resource Utilization and Environmental Protection, Nanjiang Hydrogeological Team Under the Chongqing Geological Bureau of Geology and Minerals Exploration, Chongqing 401121, P. R. China
Abstract:
Karst groundwater system is characterized by properties of openness and vulnerability, which makes the groundwater vulnerable to pollution. To investigate the hydrochemical variation of the karst groundwater impacted by a tourism hotel, Shuifang Spring at the core region of Jinfoshan Karst World Heritage Site, was selected to be the studied site. Hydrochemical data of Shuifang Spring were automatically monitored. The precipitation, soil water, tap water, and wastewater from hotel in the basin were manually sampled each month. Dual stable isotopes of nitrogen and oxygen were also employed. Results shows that Shuifang Spring exhibited three hydrochemical stages along with the tourism accommodation amount during the monitoring period. At the early stage of tourism peak, the hydrochemical characteristics of Shuifang Spring was significantly influenced by the rainfall. During the tourism peak, the water quality was sharply deteriorated. After the boom of tourists, the water quality was obviously improved. Discharge from the hotel domestic wastewater therefore became an important factor in the geochemical evolution of Shuifang Spring. Result of the dual stable isotopes of nitrogen and oxygen shows that nitrate of Shuifang Spring was primarily derived from manure and sewage, in addition to soil organic N. Acid, such as H2SO4, HCl and organic acids from sewage, probably involved in erosion of carbonate rock, which resulted in elevated concentrations of Ca2+, Mg2+ and HCO3- in Shuifang Spring. The peak concentration of major elements in Shuifang Spring was four-day delay relative to the peak of tourism accommodation as a result of rapid diffusion of pollutants in the well-developed karst conduit and highly flow velocity.
Key words:  Hotel sewage  karst groundwater  hydrochemical characteristics  nitrogen and oxygen isotopes  Jinfoshan  Shuifang Spring
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