The Nutritional Status of Waters and Origin Analysis of the Xitiaoxi Tributaries

Abstract:

This paper investigates the seasonal and spatial variations of nutrients, permanganate index and chlorophyll-a of the Xitiaoxi tributaries. The results show that most of nutrients, COD_Mn and chlorophyll-a in dry season are higher than in wet season. The concentrations of TN and NO₃^--N show significant higher in the tributaries dominated by woodland. The contents of TP, TDP and chl-a in tributaries influenced by towns are higher than the tributaries located in farmland and woodland. COD_Mn in mixed-source lands of farmland and towns have the highest concentration, followed by towns and woodland dominated tributaries. The rates of TN/TP indicate that eutrophication in most of tributaries are limited by TP. The correlations between nutrients, COD_Mn and Chl-a indicate the concentrations of organics and microorganism are associated with nitrogen and phosphorus in waters. Land use is the most important factor affecting water quality in tributaries of Xitiaoxi watershed. The values of TDP/TP in towns dominated tributaries are higher than other tributaries. Mixed-source lands are the most important factor affecting NH₄⁺-N values.

• Periodical: Advanced Materials Research (Volume 937)
• Pages: 669-675
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.937.669
• Online since: May 2014
• Authors: Huan Wang, Xu Yin Yuan*, Zheng Yang Li, Hai Yan Xu, Hai Long Chen
• Keywords: Chl-a, COD_Mn, Nutrient, Tributaries, Xitiaoxi Watershed

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