摘要
为研究三垟湿地不同底泥疏浚量对水体的影响,采用STELLA软件,构建了三垟湿地水体TP变化的生态模型并进行了模拟。结果表明:若不疏浚,水体TP会进一步增加;若将1/4的底泥清除,可维持现有水质不再恶化;若清除3/4的底泥,会对水质起到改善作用,第13个月TP浓度可接近Ⅴ类水标准,3年后达Ⅳ类水标准。模拟注入Ⅳ类水,不进行底泥疏浚,TP浓度会迅速增加,1个月后增加到407.09mg.m-3,超过Ⅴ类水标准;若清除底泥的1/4,水质也迅速恶化,2个月后为433.50mg.m-3;若清除底泥的1/2,TP浓度会缓慢上升,3个月后仍好于Ⅴ类水,但水质仍缓慢趋于恶化;若清除3/4的底泥,则TP浓度缓慢下降,具有维持和净化水质的效果。
In order to study the influences of different amounts of bottom mud dredged in Wenzhou Sanyang wetland on water quality,this paper employed STELLA software to construct a model of the concentration of TP in water over time,then,according to the model,calculated out the effects on water quality by different amounts of bottom mud dredged.The results of the model showed that: simulation values were close to the observed data,reaching very high precision.The simulation of different amounts of bottom mud dredged indicated that: if no bottom mud was carried out,and because of the bottom mud,the concentration of TP in water would increase further;and if no effect on original water quality during dredging,when1/4 of the mud was disposed,it could prevent the exiting water quality from worsening;and if 3/4 of the mud were disposed,it could improve the water quality and TP would be close to the Standard of Ⅴ water in the 13th month with 402.67 mg·m-3;and TP would reach the Standard of Ⅳ water in three years later,with 299.52 mg·m-3.And if Ⅳ water was poured into after dredging,namely,TP concentration of 300 mg·m-3,when no bottom mud dredged,the TP concentration in water would rise up to 407.09 mg·m-3 in a month,quickly exceeding the Standard of Ⅴ water;if 1/4 of the mud were removed,the water quality would worsen rapidly,TP would be 433.50 mg·m-3 in two months;when half of mud were removed,TP of water would rise slowly and would be better than Ⅴ water in three month,with 393.02 mg·m-3.Because of residual mud,the water quality would still be worsen slowly;and if 3/4 of the mud were carried out,TP of the water would drop off slowly and could maintain better water quality.It may be concluded that according to the simulation,if 3/4 of mud were removed,it would be very useful to maintain and improve water quality of Sanyang wetland.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2006年第S1期158-162,共5页
Journal of Agro-Environment Science
关键词
湿地
水体污染
营养盐
富营养化
生态模型
wetland
water pollution
nutrients
eutrophication
ecological model
