| 南亚热带典型调水型水库——广东大镜山水库的富营养化特征分析 |
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| 引用本文： | 张华俊,李秋华,韩博平.南亚热带典型调水型水库——广东大镜山水库的富营养化特征分析[J].湖泊科学,2010,22(2):291-299. |
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| 作者姓名： | 张华俊 李秋华 韩博平 |
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| 作者单位： | 暨南大学水生生物研究所,广州,510632 |
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| 基金项目： | 国家自然科学基金"863"项目，珠海市科技计划重大项目 |
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| 摘 要： | 调水型水库是一种以抽水入库为主要来水水源的水体,是沿海地区重要的供水水源地.为了解这类水库的富营养化特点,于2005年全年每月2次对地处我国南亚热带地区(广东珠海市)的大镜山水库进行采样和监测.监测和测定指标主要包括氮、磷营养盐浓度、水温、透明度及叶绿素a浓度等,结合水库水文数据对水库富营养化特征和主要的影响因素进行分析.结果表明,2005年,大镜山水库的富营养化状态TSI_M指数在45-53之间,水库处于中富营养状态,多数时间处于富营养状态.水体富营养化主要参数表现出明显的季节变化,即叶绿素a浓度和富营养化状态指数在早春和晚秋出现两个峰值,明显地与温带富营养化水体在夏季出现单个峰值的特征不同.调水入库增加了水库营养盐负荷的同时,也在很大程度上影响了水库水动力学过程,与夏季的集中强降雨一起成为影响该水库富营养化的关键因素,这些因素改变了浮游植物群落对营养盐的直接响应,导致叶绿素a浓度与总磷、总氮浓度之间呈弱相关关系,降水和调水量在时间上相对配置重要性决定了叶绿素a浓度与营养盐浓度的关系.
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| 关 键 词： | 调水水库 富营养化 叶绿素a浓度 水动力学 南亚热带 大镜山水库 |
| 收稿时间： | 2009/11/5 0:00:00 |
| 修稿时间： | 2009/12/2 0:00:00 |
Eutrophication of a typical pumped storage reservoir, Dajingshan Reservoir, subtropical China |
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| ZHANG Huajun,LI Qiuhua and HAN Boping.Eutrophication of a typical pumped storage reservoir, Dajingshan Reservoir, subtropical China[J].Journal of Lake Science,2010,22(2):291-299. |
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| Authors: | ZHANG Huajun LI Qiuhua and HAN Boping |
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| Institution: | Institute of Hydrobiology,Jinan University,Guangzhou 510632,P.R.China,Institute of Hydrobiology,Jinan University,Guangzhou 510632,P.R.China and Institute of Hydrobiology,Jinan University,Guangzhou 510632,P.R.China |
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| Abstract: | Pumped storage reservoirs are a type of water bodies which usually have small catchments and mostly store water that was pumped from near rivers.The special reservoirs play an important role in drinking water supply in coastal regions.In order to understand eutrophication processes of these reservoirs,we investigated the Dajingshan Reservoir,a typical pumped storage reservoir,located in Zhuhai,Guangdong,a subtropical area of China.The reservoir was monitored and sampled every two times a month in 2005.The monitored variables included nutrients(nitrogen and phosphorus),chlorophyll-a concentration,transparency,temperature,precipitation and pumped water amount.The trophic state index(TSOIM)of the reservoir ranged from 45 to 53,indicating that the reservoir was in meso-eutrophic states,but eutrophic staie was present in the reservoir in most time of the year.There was a seasonal variation of eutrophication with two peaks of chlorophyll-a concentration and TSIM in early spring and late autumn.This seasonal pattern is markedly different from those eutrophic lakes with only a peak in summer in temperate water body.Pumping water into reservoir not only increased nutrient loading,but also modified largely hydrodynamic processes.Combining with the heavy precipitation in summer,pumping water became a major factor affecting eutrophication processes,changing the phytoplankton community into a direct response to nutrient loading.The chlorophyll-a concentration correlations with total phosphorus concentration or with total nitrogen concentration were markedly weakened,and the timing configuration of pumping water and precipitation have determined the ratio of chlorophyll-a concentration and nutrient concentration. |
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| Keywords: | Pumped storage reservoir eutrophication concentration of chlorophyll-a hydrodynamics subtropics Dajingshan Reservoir |
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