Water quality in relation to land use and land cover in the upper Han River Basin, China
Water quality in relation to land use and land cover in the upper Han River Basin, China
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DOI：
10.1016/j.catena.2008.06.005
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发表时间：
2008-10-15
期刊：
影响因子：
6.2
通讯作者：
Zhang, Quanfa
中科院分区：
文献类型：
--
作者：
Li, Siyue;Gu, Sheng;Zhang, Quanfa
在中国所在的汉江流域上游(约95,200公里(2))的河网中，共选择了42个采样点。在2005-2006年期间，收集了252个水样，并对其进行了物理化学变量分析，以调查其时空变异性，特别是与土地利用和土地覆盖的关系。方差分析(ANOVA)表明，整个流域的pH、EC、TDS、浊度、SPM、ORP和氮具有显著的空间变异性。同时，N、ORP、I-Mn和浊度在雨季普遍表现出较高的值。相关分析和回归分析表明，水温、I-Mn和N与植被盖度显著相关，植被盖度较高的小流域浊度、SPM、I-Mn、养分和TDS相对较低。裸地对河网氮素浓度有显著影响，表明流域具有较大的地质来源。城市面积百分比是pH和DP的预测因子，农用地是SPM和I-Mn的预测因子。该研究可为流域水资源保护的可持续土地利用实践提供重要信息。(C)2008 Elsevier B，V.保留所有权利。
A total of 42 sampling sites were selected in the riverine network of the upper Han River basin (approximately 95,200 km(2)) of China. Over the time period of 2005-2006, 252 water samples were collected and analyzed for physico-chemical variables in order to investigate their spatio-temporal variability in particular the relationship with land use and land cover. Analysis of variance (ANOVA) indicated significant spatial variability in pH, EC, TDS, turbidity, SPM, ORP and nitrogen across the basin. Meanwhile, nitrogen, ORP, I-Mn and turbidity generally displayed higher values in the rainy season. Correlation analysis and regression analysis indicated that water temperature, I-Mn, and nitrogen were significantly related to vegetated coverage, and subwatersheds with higher vegetation cover had relative lower turbidity, SPM, I-Mn, nutrients and TDS. Bare lands had significant influence on nitrogen concentration in the riverine network, implying its large geologic sources in the basin. Percentage of urban area was the predictor for pH and DP, while agricultural land for SPM and I-Mn. The research could provide critical information in sustainable land use practice for water resource conservation for the basin. (C) 2008 Elsevier B,V. All rights reserved.