生态与农村环境学报 ›› 2007, Vol. 23 ›› Issue (1): 54-56.doi: CNKI:SUN:NCST.0.2007-01-011

• 论文 • 上一篇    下一篇

冬季菹草对悬浮泥沙的影响

曹昀, 王国祥   

  1. 南京师范大学地理科学学院
  • 收稿日期:2006-07-19 出版日期:2007-01-25 发布日期:2011-05-09
  • 通讯作者: 王国祥 南京师范大学地理科学学院
  • 作者简介:曹昀(1974-),男,甘肃镇原人,博士生,从事水生植物与水环境生态修复研究。
  • 基金资助:

    教育部科技创新工程重大项目培育基金(#705824);江苏省重点科技专项(BM200270);863国家高技术研究发展计划资助项目(2003AA601100)

Effects of Submersed Plant Potamogeton crispus on Suspended Mud and Sand

CAO  Yun, WANG  Guo-Xiang   

  1. College of Geographical Science,Nanjing Normal University
  • Received:2006-07-19 Online:2007-01-25 Published:2011-05-09
  • Contact: WANG Guo-Xiang College of Geographical Science,Nanjing Normal University

摘要: 利用冬季沉水植物菹草构建由浅水到深水的串联系统,含沙水依次流经浅水区和深水区,测定各级菹草对水体悬浮泥沙含量和沉降量的影响。结果显示,菹草系统可以降低水体中悬浮泥沙含量,并随水力停留时间延长而降低程度加大。各运行条件下,菹草系统悬浮泥沙平均沉降量65.7 g.m-2,比对照组高39.4%。菹草表面泥沙的吸附是一个“吸附—沉降—再吸附”的动态过程,吸附量为3.265.69 g.kg-1。菹草对冬季水生态系统的自净功能起着十分重要的作用。

关键词: 悬浮泥沙, 菹草, 沉降, 吸附, 水力停留时间

Abstract: Submersed plant Potamogeton crispus was used to construct a holistic system connecting the shallow layer to the deep layer of water.When sandy water flows through the shallow layer to the deep one,effect of P.crispus on concentration of suspended mud and sand(MS) in different depth layers and sedimentation of MS.Results show that P.crispus reduced content of MS,and the longer they stayed with the flow,the greater the effect.The average settlement of MS in P.crispus system was 65.7 g·m-2,39.4% higher than in CK.MS sorption on the surface of P.crispus is a dynamic process of "adsorption-settlement-adsorption" ranging from 3.26 to 5.69 g·kg-1,which was related to biomass per unit area of P.crispus.Therefore,submerged plant P.crispus may play an important role in self-purification of water bodies in winter.

Key words: suspended sediment, Potamogeton crispus, sedimentation, adsorption, hydraulic retention time

中图分类号: