| 引用本文: | 何尚卫,李勇,赵海光,潘继征.滆湖水体光学性质初步研究.湖泊科学,2014,26(5):707-712. DOI:10.18307/2014.0508 |
| HE Shangwei,LI Yong,ZHAO Haiguang,PAN Jizheng.Preliminary study on the optical properties of Lake Gehu. J. Lake Sci.2014,26(5):707-712. DOI:10.18307/2014.0508 |
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| 滆湖水体光学性质初步研究 |
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何尚卫1,2, 李勇1,2, 赵海光3, 潘继征4
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1.苏州科技学院环境科学与工程学院, 苏州 215011;2.江苏省环境科学与工程重点实验室, 苏州 215011;3.云南省环境科学研究院, 昆明 650034;4.中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京 210008
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| 摘要: |
| 基于2009年7月至2010年6月滆湖全湖15个采样点的水体光学参数及相关水质理化因子数据,分析滆湖水体周年光合有效辐射(PAR)衰减特性,以期为滆湖沉水植物生态修复提供相关水体光学资料.结果表明,滆湖水体PAR衰减系数(Kd)周年变化范围为1.32~17.42 m-1.秋季Kd相对最小,平均值为2.35 m-1,变化范围为1.32~3.70 m-1;夏季Kd相对最大,平均值为6.23 m-1,变化范围为3.68~17.42 m-1.春、秋、冬季,滆湖水体真光层平均深度均满足沉水植物的生长需求,而在夏季滆湖水体真光层平均深度仅为0.84 m,小于全湖平均水深(1.20 m),因此夏季PAR是限制沉水植物恢复的因子之一.滆湖水体Kd与透明度(SD)在秋、冬季的关系为:Kd=2.089+0.705/SD.叶绿素a浓度和悬浮物浓度是影响滆湖水体Kd的重要因子之一. |
| 关键词: 滆湖 PAR 沉水植物 真光层深度 |
| DOI：10.18307/2014.0508 |
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| 基金项目:国家水体污染控制与治理科技重大专项项目(2012ZX07101-007-01)资助 |
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| Preliminary study on the optical properties of Lake Gehu |
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HE Shangwei1,2, LI Yong1,2, ZHAO Haiguang3, PAN Jizheng4
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1.School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, P. R. China;2.Key Laboratory of Environmental Science and Engineering of Jiangsu Province, Suzhou University of Science and Technology, Suzhou 215011, P. R. China;3.Yunnan Institute of Environmental Science, Kunming 650034, P. R. China;4.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China
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| Abstract: |
| Seasonal variations of the optical parameters and physicochemical properties of lake water at 15 sampling sites were investigated, from July 2009 to June 2010, to provide the basic lake optical properties data for submerged aquatic vegetations restoration of a shallow lake-Lake Gehu. The annual variation of the attenuation coefficient of photosynthetically active radiation (Kd) was 1.32-17.42 m-1. The minimum and maximum values of Kd were observed in autumn (1.32-3.70 m-1) and summer (3.68-17.42 m-1), with a medium value of 2.35 m-1 and 6.23 m-1, respectively. The average euphotic zone depth in spring, fall and winter can satisfy the demand of submerged aquatic vegetation. However, the average euphotic zone depth was only 0.84 m in summer, which was less than the average water depth(1.20 m) of Lake Gehu and implied that the photosynthetically active radiation was one of the inhibiting factors to restore the submerged aquatic vegetations in summer. The Kd and secchi disk depth (SD) in fall and winter had the relationship of Kd=2.089 + 0.705/SD. Chlorophyll-a and suspended solid were the factors influencing the Kd value in Lake Gehu. |
| Key words: Lake Gehu photosynthetically active radiation (PAR) submerged aquatic vegetation euphotic zone depth |
