文献类型：期刊文献

英文题名：Change of Nitrogen and Phosphorus in the Runoff Ditch and its Influencing Factors in Reservoir Catchment Areas

作者：Wang, Rongjia[1] Zhang, Jianfeng[1] Cai, Chunju[2] Lei, Gang[3]

第一作者：Wang, Rongjia

机构：[1] Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, 311400, China; [2] International Centre for Bamboo and Rattan, Beijing, 100102, China; [3] Anhui Taiping Test Center of International for Bamboo and Rattan, Taiping, 245718, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220036643)

语种：英文

外文关键词：Catchments - Nitrates - Nitrogen - Phosphorus - Potable water - Rain - Reservoirs (water) - Runoff - Water pollution - Water pollution control - Wetlands

摘要：Water pollution is becoming a global issue, while process control is the key step for controlling non-point source pollution (NPSP). Runoff ditches collect rainfall and often act as channels for nitrogen (N) and phosphorus (P) pollutants to enter a reservoir. Therefore, performing in situ analyses to clarify the mechanism of process control are vital for reducing the migration of N and P pollutants into reservoirs. In view of this, the Chenjiashan runoff ditch around Fushi Reservoir in Anji County was taken as the test plot and the NPSP process controls was analyzed through field investigations to determine the impact of runoff ditch landscape factors on water quality. The results indicated that landscape factors had different effects on the N and P concentrations in the runoff ditch, of which landscapes that were influenced by human activities, including residential and white tea gardens, increased N but had relatively little impact on P levels in the runoff ditch. Meanwhile, the check dam and forested wetlands reduced N concentrations, while had little effect on P concentrations change in the runoff ditch. Compared with WT3, forested wetlands (FW2) decreased the average total nitrogen (TN) (-29.53%), average dissolved nitrogen (DN) (-40.29%), and average nitrate-nitrogen (-45.32%) concentrations in the runoff ditch. The DN was mainly soluble nitrate-nitrogen. Moreover, the effects of rainfall on the N and P concentrations in the runoff ditch also differed. Obviously, the novel research suggests constructing rational landscape factors for runoff ditches is helpful to mitigate NPSP in water catchment areas and to improve drinking water quality. ? 2022, The Authors. All rights reserved.