Effects of rainfall intensity and amount on the transport of total nitrogen and phosphorus in a small agricultural watershed

被引：4

作者：

Chen, Cheng ^{[1
]}

Yu, Zhongbo ^{[1
]}

Xiang, Long ^{[1
]}

He, Jiaji ^{[1
]}

Fu, Xiaolei ^{[1
]}

机构：

[1] Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Jiangsu, Peoples R China

来源：

ADVANCES IN HYDROLOGY AND HYDRAULIC ENGINEERING, PTS 1 AND 2 | 2012年 / 212-213卷

关键词：

rainfall amount; rainfall intensity; pollutants; concentration;

D O I：

10.4028/www.scientific.net/AMM.212-213.268

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Precipitation-runoff partitioning of small basins plays an important role in the non-point pollution study. This study analyzes the contribution of precipitation and rainfall intensity in a basin scale to pollutants(e.g. nitrogen, phosphorus) migration by monitoring rainfall and runoff responses in Meilin watershed. According to the field data, the concentration of nitrogen keeps an increasing trend with the increase of rainfall amount, while phosphorus seems not so evident. Intense rainfall has a fierce scouring effect on the pollutants which have a large using amount such as total nitrogen in the steep experimental field, thus leading to a sudden decrease of pollutant concentration. After the intensity is weakened, pollutant concentration gradually goes up due to the dissolving effect of runoff.

引用

页码：268 / 271

页数：4