Spatial changes and driving factors of lake water quality in Inner Mongolia, China
Spatial changes and driving factors of lake water quality in Inner Mongolia, China
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内蒙古湖泊水质空间变化及驱动因素
DOI：
10.1007/s40333-022-0080-2
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发表时间：
2022-10
影响因子：
3
通讯作者：
Jifei Xu
中科院分区：
文献类型：
--
作者：
Xiaohui Ren;Ruihong Yu;Xinyu Liu;Heyang Sun;Yue Geng;Zhen Qi;Zhuangzhuang Zhang;Xiangwei Li;Jun Wang;Penghang Zhu;Zhiwei Guo;Lixin Wang;Jifei Xu
湖泊在内蒙古自治区生态系统和经济发展中发挥着重要作用，但湖泊水质的空间格局及其驱动机制尚不清楚。以内蒙古自治区为研究区域，从西到东，对居延海、乌兰素海、红碱淖、岱海、查干诺尔、呼伦和乌兰诺尔7个湖泊的水质空间变化及其驱动因子进行了研究。采用综合营养水平指数（TLI（ELI））、多元统计和空间分析方法进行了大规模研究。结果表明，内蒙古大部分湖泊呈弱碱性。湖水总溶解性固体和盐度具有明显的分带性。氮和磷是湖泊的主要污染物，总氮和总磷的平均浓度分别为4.05和0.21 mg/L。TLI（Σ）值范围为49.14 ~ 71.77，表明湖泊富营养化程度不同，磷是湖泊富营养化的主要驱动因素。根据盐度和TLI（盐度），内蒙古湖泊可分为岱海以西湖泊和岱海以东湖泊。岱海西部湖泊的盐度水平高于东部湖泊，而湖泊的营养水平则相反。人类活动强度和方式是湖泊水质空间格局的驱动因子。建议控制人为活动对内蒙古湖泊水质的影响，改善湖泊生态环境。研究结果为内蒙古湖泊水质空间格局变化的驱动机制提供了更深入的认识，可为该地区湖泊生态系统保护和水资源管理提供参考。
Lakes play important roles in sustaining the ecosystem and economic development in Inner Mongolia Autonomous Region of China, but the spatial patterns and driving mechanisms of water quality in lakes so far remain unclear. This study aimed to identify the spatial changes in water quality and the driving factors of seven lakes (Juyanhai Lake, Ulansuhai Lake, Hongjiannao Lake, Daihai Lake, Chagannaoer Lake, Hulun Lake, and Wulannuoer Lake) across the longitudinal axis (from the west to the east) of Inner Mongolia. Large-scale research was conducted using the comprehensive trophic level index (TLI (Σ)), multivariate statistics, and spatial analysis methods. The results showed that most lakes in Inner Mongolia were weakly alkaline. Total dissolved solids and salinity of lake water showed obvious zonation characteristics. Nitrogen and phosphorus were identified as the main pollutants in lakes, with high average concentrations of total nitrogen and total phosphorus being of 4.05 and 0.21 mg/L, respectively. The values of TLI (Σ) ranged from 49.14 to 71.77, indicating varying degrees of lake eutrophication, and phosphorus was the main driver of lake eutrophication. The lakes of Inner Mongolia could be categorized into lakes to the west of Daihai Lake and lakes to the east of Daihai Lake in terms of salinity and TLI (Σ). The salinity levels of lakes to the west of Daihai Lake exceeded those of lakes to the east of Daihai Lake, whereas the opposite trend was observed for lake trophic level. The intensity and mode of anthropogenic activities were the driving factors of the spatial patterns of lake water quality. It is recommended to control the impact of anthropogenic activities on the water quality of lakes in Inner Mongolia to improve lake ecological environment. These findings provide a more thorough understanding of the driving mechanism of the spatial patterns of water quality in lakes of Inner Mongolia, which can be used to develop strategies for lake ecosystem protection and water resources management in this region.
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