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首页> 外文期刊>African Journal of Aquatic Science >Effect of an impoundment on nutrient dynamics in the Kihansi River, Tanzania.
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Effect of an impoundment on nutrient dynamics in the Kihansi River, Tanzania.

机译：坦桑尼亚基汉西河蓄水对养分动态的影响。

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摘要

The impact of the Kihansi Dam on electrical conductivity, pH, temperature and dissolved oxygen in the Kihansi River was assessed in 2005 after 85% of the original river flow had been diverted to the Lower Kihansi power plant. The results are compared with the data obtained in 1995 before the dam was constructed. Primary production and nitrogen and phosphorus concentrations from sites upstream and downstream of the dam as well as in the reservoir were compared. Phosphorus fractions were determined in the reservoir's sediment. Electrical conductivity and pH values were higher in 2005 than in 1995, whereas oxygen concentrations were lower. Primary production, nitrogen and phosphorus concentrations were lower at stations downstream of the dam than at upstream stations. High fractions of iron- and manganese-bound phosphorus in the reservoir sediment suggest a potential for phosphorus retention. Concentrations of nitrogen and phosphorus along the Kihansi River were higher during the dry season than in the wet season. These results contribute to the documented baseline data on environmental changes in tropical river systems after flow diversion and reservoir development.
机译：2005年，在将原始河水的85％转移至下汉西电站之后，对了汉西大坝对汉西河中电导率，pH，温度和溶解氧的影响进行了评估。将结果与1995年大坝建造之前获得的数据进行比较。比较了大坝上游和下游以及水库中的初级产量和氮，磷浓度。确定了水库沉积物中的磷含量。与1995年相比，2005年的电导率和pH值较高，而氧气浓度较低。大坝下游站的初级产量，氮和磷浓度低于上游站。铁和锰结合的磷在储层沉积物中的比例很高，表明存在潜在的磷滞留。干旱季节，沿Khanssi河沿岸的氮和磷浓度高于湿季。这些结果有助于对分流和水库开发后热带河流系统环境变化的基线数据进行记录。

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