作　　者： ; ; ; (向军）;

机构地区： 河海大学环境科学与工程学院

出　　处： 《城市环境与城市生态》 2003年第6期136-138,共3页

摘　　要： 以肇庆星湖为研究对象,研究了其沉积物的各种特性。研究表明:(1)星湖沉积物的矿相(晶体物)主要为石英、伊利石、长石、绿泥石等;(2)沉积物中的TP、TN含量,基本随湖水交换和季节变化而变化,与交换量有着简单反比关系,其TP的含量在0.03%～0.06%之间,TN在0.19%～0.28%之间,内负荷较为严重;(3)沉积物的沉降存在很大的不均衡性;(4)沉积物营养物的释放受环境因子影响,其中溶解氧对N、P的释放都有较大的影响,温度对P的影响较N多一些,而保持水体中性,则有利于水体的稳定。 Sediment is the main end-result for nutrient lakes.Zhaoqing lake has been chosen as the research object and many kinds of characteristics have been studied.The results show that:(1)The ore body of sediment in Xing lake are SiO_2、KAl[(OH)_2/(Si,Al)_4O_(10)]、Ca[Al_2SiO_8]and Mg_6(Fe,Mg,Al)_6[(OH)_(16)/(Si,AL)_8O_(20)]etc.(2)The concentrations of TP and TN in the sediment varies with the water exchanging and season altering,and have a simple inverse ratio with the water exchanging amount.The concentration of TP ranges from 0.03% to 0.06% and TN ranges from 0.19% to 0.28%(dry sediment weight).Meanwhile,the inner loading is very serious.(3)There are great imbalances in the subsidence of sediment of the Xing lake.(4)The release of nutrient is affected by the environment factor.The release of N and P has been affected by DO and temperature affects P more than N.Moreover,keeping the water neutral will be propitious to the stabilization of it.

关 键 词： 星湖 沉积物 矿相 沉降 释放

领　　域： [环境科学与工程]