Long-term trends in water quality in an under-populated watershed and influence of precipitation
Long-term trends in water quality in an under-populated watershed and influence of precipitation
复制标题
人口稀少流域水质的长期趋势和降水的影响
DOI：
10.2965/jwet.2009.293
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
H. Somura
中科院分区：
文献类型：
--
作者：
I. Takeda;A. Fukushima;H. Somura
对一个人口稀少的流域的水质进行了为期15年的调查，每隔一周收集一次数据。本研究的目的是分析水质的长期趋势，并评价水质与降水的关系。在强降水条件下，总磷（T-P）、化学需氧量（COD）和悬浮物（SS）的浓度均达到非常高的值，且随降水量的增加呈指数增长。研究过程中，人口、工厂数量、动物（牛、猪）数量、农业用地面积呈现明显减少趋势，生活污水处理稳步推进。在降水变化不显著的情况下，水质参数没有明显下降，氮、磷、COD浓度有所升高。解释水质没有明显下降的一个可能的假设是，近年来从森林和农业用地流出的特定污染物可能有所增加。这是因为在人口稀少的流域，管理不善的森林和农业用地对河流的水质产生了不利影响。
An investigation of the water quality in an under-populated watershed was conducted over a 15-year period in which data was collected at weekly intervals. The purposes of this study were to analyze the long-term trends in water quality and to evaluate the relationship between the water quality and precipitation. Concentrations of total phosphorus (T-P), chemical oxygen demand (COD), and suspended solids (SS) reached remarkably high values under heavy precipitation conditions, and these concentrations increased exponentially with the amount of precipitation. Over the course of this study, the population, number of factories, animals (cow and pig), and area of agricultural land exhibited clearly decreasing trends, while steady progress in domestic wastewater treatment was realized. However, no clear decrease in the parameters of water quality was observed, and some nitrogen, phosphorus, and COD concentrations increased even though no significant change in precipitation occurred. A possible hypothesis explaining this lack of a clear decrease in water quality is that specific pollutant outflows from forests and agricultural lands may have increased in recent years. This is because poorly managed forests and agricultural lands in the under-populated watershed have adversely affected the water quality of the rivers.
影响因子：
12.8
作者：
I. Takeda;A. Fukushima
通讯作者：
I. Takeda;A. Fukushima
影响因子：
12.8
作者：
I. Takeda;A. Fukushima
通讯作者：
I. Takeda;A. Fukushima