基于生物-光学模型的浅水湖泊水体透明度模拟研究  

On water transparency model of shallow lake based on bio-optical model

作　　者：李一平[1,2] 滑磊[3] 谈永锋 郝文彬[2] 唐春燕[2] Kumud Acharya 狄成斌 

机构地区：[1]"浅水湖泊综合治理与资源开发"教育部重点实验室,南京210098 [2]河海大学环境学院,南京210098 [3]浙江省水利河口研究院,杭州310020 [4]南京市水利规划设计院有限责任公司,南京210006 [5]沙漠研究所,拉斯维加斯美国89119 [6]河海大学水文水资源与水利工程科学国家重点实验室,南京210098 [7]济南市锦绣川水库管理处,济南250112

出　　处：《水力发电学报》2013年第6期127-134,共8页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金(51379061;51009049);河海大学水文水资源及水利工程国家重点实验室开放基金(基于生物-光学模型的浅水湖泊水体透明度模拟研究);水利部公益性行业科研专项经费项目(201101020);江苏省自然科学基金(BK20131370)

摘　　要：水体透明度能够直观反映湖泊水下光场的分布情况,是沉水植物生态恢复的基础条件。以2005年太湖常规采样点实测资料为基础,研究了浅水湖泊水体固有光学特性与水体成分浓度之间的生物光学模型,分析了透明度与光束衰减系数、漫射衰减系数、人眼分辨力之间的关系模型;以生物光学模型为基础,将基于水体成分浓度的透明度反演模型与湖泊三维水动力模型、水质模型和沉积物传输模型相耦合,构建了浅水湖泊水体透明度模型。将该模型与现有的多元回归模型对比,分析了对透明度模拟的精度状况。利用该模型,模拟了不同水动力时水体透明度分布,对太湖生态恢复潜力进行分析,得出了不同水动力条件下太湖典型沉水植物可能恢复的区域,为浅水湖泊生态恢复提供了依据。Water transparency that determines underwater light distribution in a lake is a basic condition for ecological restoration in the lake. A bio-optical model was studied in this work for calculation of inherent optical properties of water and its component concentration in shallow lakes, using long-term monthly data measured at the monitoring stations in Lake Tai. Based on this model, a water transparency model was developed to analyze beam attenuation coefficient, diffuse attenuation coefficient and human eye＇ s ability to distinguish contrast, and an inverse model of transparency was developed to simulate water component concentration. This transparency model of shallow lake integrateed three coupling models, i.e. three-dimensional hydrodynamic model, water quality model and sediment transport model. Water transparency was simulated for different hydrodynamic conditions and its accuracy was estimated by comparison with other multiple regression models. The recovery potential of typical submerged plants and the recoverable areas in Lake Tai were predicted for various hydrodynamic conditions. The water transparency model would provide a basis for ecological restoration of shallow lakes.

关 键 词：环境水力学 透明度模型 生物-光学模型 浅水湖泊 环境流体动力学模型 

分 类 号：X143[环境科学与工程—环境科学]