文献类型：期刊文献

英文题名：Effect of in-stream impoundment on water quality of a suburban stream

作者：Shimizu, Yuta[1];Onodera, Shin-ichi[2];Jin, Guangzhe[3];Saito, Mitsuyo[4]

机构：[1]Natl Agr & Food Res Org, Western Reg Agr Res Ctr, 6-12-1 Nishi Fukatsu, Fukuyama, Hiroshima 7218514, Japan;[2]Hiroshima Univ, Grad Sch Adv Sci & Engn, 1-7-1 Kagamiyama, Hiroshima, Hiroshima 7398521, Japan;[3]Guangdong Ocean Univ, Coll Ocean & Meteorol, 1 Haida Rd, Zhanjiang 524088, Guangdong, Peoples R China;[4]Okayama Univ, Grad Sch Environm & Life Sci, Kita Ku, 3-1-1 Tsushima Naka, Okayama, Okayama 7008530, Japan

年份：2020

卷号：21

期号：3

起止页码：393

外文期刊名：LIMNOLOGY

收录：SCI-EXPANDED(收录号：WOS:000528319900003)、、Scopus(收录号：2-s2.0-85084138356)、WOS

基金：The authors thank Ms. K. Onodera, Mr. Y. Kato, and Mr. K. Onishi for their assistance in chemical analysis and field measurement. This study was supported by the Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research grants (# 18201007 and # 21241011).

语种：英文

外文关键词：Phosphorus; In-stream impoundment; Retention; Suburban watershed

外文摘要：This study aims to confirm the effect of a small stream impoundment on phosphorus and nitrogen dynamics in a suburban watershed. The results show that the phosphate concentration in the water body was significantly higher than that in the inflowing water under ordinary flow conditions. The phosphorus promotes algal growth that causes significant diurnal dissolved oxygen variation because of photosynthesis and respiration. The phosphate exchange between the sediment and overlying water was mainly controlled by diffusion flux rather than by advective flux seepage because of large amounts of phosphorus accumulated on the surface of the sediment. When a flood occurs, the phosphorus-enriched water is flushed downstream by rain-swollen currents. In summary, an impoundment affects in-stream phosphorus concentration through organic matter degradation and the release of phosphate in the sediment.