| 朱德军,段泽华,陈永灿,FANG Xing.密云水库热氧分布模型及多年热氧分布特征模拟[J].水利学报,2015,46(10):1155-1161,1171 |
| 密云水库热氧分布模型及多年热氧分布特征模拟 |
| Numerical Oxythermal model and multi-year distribution of water temperature and dissolved oxygen in Miyun Reservoir |
| 投稿时间：2014-12-18 |
| DOI：10.13243/j.cnki.slxb.20141524 |
| 中文关键词: 密云水库 热氧分布 数值模拟 MINLAKE |
| 英文关键词: Miyun Reservoir Oxythermal distribution numerical modeling MINLAKE |
| 基金项目:国家自然科学基金项目(51279078);清华大学自主科研计划(20121088082) |
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| 中文摘要: |
| 水温和溶解氧是描述水生态系统最重要的两个参数,对于全面把握水质情况具有重要意义。利用实测数据进行水质分析会受到观测条件与成本的限制,因而模型与实测数据相结合的方法逐渐得到广泛应用。本研究对湖泊水质模型MINLAKE进行改进,考虑出入流使之适用于水库,并利用密云水库2005年实测水质数据对模型参数进行率定。随后利用改进的模型对密云水库1998—2011年热氧分布进行模拟。结果显示,密云水库水体的热氧分布存在规律性的年内波动,随着水位的变化,表层水温年平均值变化不明显,深层水温波动幅度加剧,年均水温显著上升;表层年均溶解氧含量没有明显变化,深层溶解氧浓度波动减弱,年均溶解氧浓度上升。改进后的MINLAKE 模型能弥补现场监测频率和测点布置密度等方面的限制,给出密云水库较为合理的垂向热氧分布,基本反映出实际的热氧分布情况。 |
| 英文摘要: |
| Water temperature and dissolved oxygen (DO) are two basic indicators of water quality. To accu-rately simulate water temperature and DO profiles in reservoirs, the one dimensional vertical water quality model MINLAKE was refined by adding a subroutine accounting for inflow and/or outflow processes. The model was calibrated using field data of water temperature and DO in Miyun Reservoir from the year 2005, and then used to simulate the vertical distributions of water temperature and DO in Miyun Reservoir from 1998 to 2011. The simulated water temperature and DO in surface, middle and bottom depths all ex-hibited seasonal fluctuation. As the water level declined, the temperature in the surface depth was relative-ly unchanged, while both the fluctuation and the annual mean value of temperature significantly increased in the bottom depth. Similarly, the annual mean DO concentration in the surface depth remained relatively unchanged with the decline of water level;while in the bottom depth,the fluctuation decreased and the an-nual mean DO concentration significantly increased. |
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