红原-若尔盖草原地下水水质评价

Evaluation of groundwater quality in the Hongyuan-Zoige grassland

红原—若尔盖草原位于四川省西北部高山高原区,地下水资源丰富,是四川省生态环境对地下水变化最敏感的地区。本文基于草原48处国家地下水监测站2018年53组水样测试结果,并参考早期若尔盖草原水文地质环境地质综合评价成果,对该区域地下水水质进行评价,结果显示:红原若尔盖草原地下水多为HCO_(3)^(-)~Ca^(2+)型水,超出Ⅲ类的常规指标主要为pH值、总硬度、溶解性总固体、铁、锰、铝、耗氧量等一般性化学指标和亚硝酸根、硝酸盐、氟化物、砷、铅等毒理学指标。原生环境状况、畜牧业的发展引起的动物排泄物和植物的腐烂等是影响水质的主要因素。研究结果以期为未来区域生态环境保护及水资源保护提供基础依据。

Hongyuan-Zoige Grassland is located in the high mountain and plateau area in the northwest of Sichuan Province,which is rich in groundwater resources.It is the most sensitive area of ecological environment to groundwater change in Sichuan Province.Based on the test results of 53 groups of water samples from 48 national groundwater monitoring stations in the grasslands in 2018,and with reference to the comprehensive evaluation results of hydrogeology and environmental geology in the early Zoige grassland,this paper evaluates the groundwater quality in the region,The result shows:the Hongyuan-Zoige grassland groundwater is HCO_(3)^(-)~Ca^(2+)water more,beyondⅢclass main conventional index for pH value,total hardness,total soluble solid,iron,manganese,aluminum,oxygen consumption,etc.The general chemical index and nitrite,nitrate,fluoride and arsenic,lead,toxicology indicator.The main factors affecting water quality are the conditions of native environment,animal excrement and plant decay caused by the development of animal husbandry.The research results are expected to provide a basis for regional ecological environment protection and water resources protection in the future.