Modelling of Nonpoint Source Pollution in Akagera Transboundary River in Rwanda
Modelling of Nonpoint Source Pollution in Akagera Transboundary River in Rwanda
复制标题
卢旺达阿卡盖拉跨界河流面源污染模拟
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
I. Nansubuga
中科院分区：
文献类型：
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作者：
U. Wali;I. Nhapi;A. Ngombwa;N. Banadda;H. Nsengimana;R. Kimwaga;I. Nansubuga
在本文中，我们评估的Akagera跨界河流的污染水平。对NH_4-N、NO_3-N、PO_4-P、TDS、电导率、pH值、温度和浊度进行了测定和定量分析。从2008年3月至2009年2月，在Akagera河系统的11个采样点每月进行一次采样。利用卫星图像和地面实况对土地利用和土地形态特征进行了研究。从这个污染减少因素的公斤/公顷.年的污染负荷的开发为每一个土地利用类型，并用于开发模型。降雨量和河流流量的数据是从测量站和周围的河流。水质参数尤其是NH_3-N从0变化到2.36 mg/l，NO_3-N从1.8 mg/l变化到314.4 mg/l，PO_4-P从0.02 mg/l变化到19.3 mg/l。与计算的出口系数值支持的实地观察表明，裸露的土壤是最有影响力的负面因素，在阿卡盖拉河水质。
In this paper, we to assess the level of pollution in the Akagera Transboundary River. The followings parame- ters namely NH4-N, NO3-N, PO4-P, Total Dissolved Solids (TDS), conductivity, pH, Temperature, and Turbidity were identified and quantified. Sampling was conducted a monthly basis from March 2008 to February 2009 at eleven sampling points on the Akagera River system. The landuse and land form characteristics were studied using satellite imagery and ground truthing. From this pollution reduction factors in terms of kg/ha.yr of pollution load were developed for each lan- duse type and used for developing the model. Rainfall and river flow data were obtained from gauging stations in and around the river. Water quality parameters particularly values of NH3-N changed from 0 to 2.36 mg/l, NO3-N from 1.8 mg/l to 314.4 mg/l and PO4-P from 0.02 mg/l to 19.3 mg/l. Field observations supported with computed export coefficient values showed that bare soils are the most influencing negative factor on water quality in the Akagera River.