首页|丹江口水库官山河流域生源要素分布特征及影响因素

丹江口水库官山河流域生源要素分布特征及影响因素

扫码查看
原文链接
  • 万方数据
  • 维普
研究河流水体生源要素空间分布特征及影响因素对流域水质管理至关重要.以丹江口水库官山河流域为例,分析枯水期水体生源要素的变化特征,基于地理探测器模型探究气象、地形、土地利用、人类活动等因素对生源要素的单一影响与交互影响.结果表明,官山河枯水期水体呈弱碱性,大多处于富氧状态,干流水体溶解氧(DO)、总溶解固体(TDS)浓度等参数存在明显的空间变异性,但干流与支流水体基本理化参数总体差异不显著.水体溶解性碳以无机碳为主,C、N、P、Si浓度低于我国部分南方河流,且存在显著的空间差异,水质状况总体良好.生源要素浓度之间存在一定的相关性,降水、气温和高程等因素可以较好地解释溶解无机碳(DIC)和溶解硅(DSi)质量浓度变化,土地利用类型之间、土地利用与降水等因素之间的交互作用可以显著提升对生源要素浓度变化的解释力度.研究结果对南水北调中线水源涵养区水环境保护具有重要意义.
Distribution Characteristics and Influencing Factors of Biogenic Elements in the Guanshan River Basin of Danjiangkou Reservoir
Studying the spatial distribution and influencing factors of biogenic elements is crucial for effective water quality management.We analyze changes in biogenic elements during dry season in the Guanshan River,a major tributary of the Danjiangkou Reservoir.We employed GeoDetector to assess the individual and interactive effects of meteorological conditions,terrain,land use,human activities,and other factors on biogenic elements.Findings indi-cate that during dry season,the Guanshan River is slightly alkaline and predominantly oxygen-rich,and exhibits sig-nificant spatial variability in parameters such as dissolved oxygen(DO)and total dissolved solids(TDS)along the main stream,though basic physical and chemical parameters do not differ notably between the main stream and trib-utaries.Inorganic carbon predominates in the river's dissolved carbon content.The concentrations of carbon(C),nitrogen(N),phosphorus(P),and silicon(Si)are lower compared to some southern rivers in China,with notable spatial variations.The river does not exhibit eutrophication,and its water quality is generally good.A correlation ex-ists among the concentrations of biogenic elements,with variations in dissolved inorganic carbon(DIC)and dis-solved silicon(DSi)mass concentrations being effectively explained by precipitation,temperature,and elevation.Interactions among land use types and between land use and factors such as precipitation significantly enhance the interpretation of changes in biogenic element concentrations.These results are important for water environmental protection in the water conservation area of the Middle Route of the South-to-North Water Diversion Project.

biogenic elementsGeoDetectorinfluencing factorswater quality analysismiddle route project of South-to-North Water DiversionGuanshan River Basin

吴颐杭、张乾柱、罗袁、卢阳、金可

展开 >

长江科学院重庆分院,重庆 400026

重庆交通大学河海学院,重庆 400074

生源要素 地理探测器 影响因素 水质分析 南水北调中线工程 官山河流域

武汉市2022年度知识创新专项-曙光计划项目中央级公益性科研院所基本科研业务费项目中央级公益性科研院所基本科研业务费项目国家重点研发计划项目

2022020801020245CKSF2023299/CQCKSF2021744/TB2021YFE0111900

2024

10.11988/ckyyb.20240062

长江科学院院报
长江科学院

长江科学院院报

CSTPCD北大核心
影响因子：0.618
ISSN：1001-5485
年,卷(期)：2024.41(10)