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首页> 外文学位 >Simulation of lake evaporation with an energy balance - eddy diffusion model of lake temperature: Model development and validation, and application to lake-level variations at Henry-Malheur Lake, Oregon.
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Simulation of lake evaporation with an energy balance - eddy diffusion model of lake temperature: Model development and validation, and application to lake-level variations at Henry-Malheur Lake, Oregon.

机译：具有能量平衡的湖泊蒸发模拟-湖泊温度的涡流扩散模型：模型的开发和验证，以及在俄勒冈州亨利-马尔黑尔湖的湖泊水位变化中的应用。

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摘要

Variations in the level of lakes are strongly influenced by lake evaporation, which is difficult to measure or estimate. One approach to deriving lake evaporation estimates is through simulation modeling. In this dissertation, a model of the evolution of the thermal structure and energy balance of a lake is developed, validated, and applied for modeling lake-level variations.;The model is based on a one-dimensional eddy diffusion model that simulates changes in lake heat storage, as determined by the balance between net incoming radiation and the flux of radiant, latent, and sensible heat across the water-atmosphere boundary. Data for incoming short- and longwave radiation, wind velocity, air temperature, and air vapor pressure are required by the model, and temperature and evaporation are simulated. No lake-specific fitting of model parameters is required. When the model is combined with water balance data for a lake, variations in lake level can be simulated as well.;Results from the validation experiments for Salton Sea, California and Pretty Lake, Indiana indicated that the model is capable of accurately simulating the seasonal cycles of lake thermal structure, lake evaporation, and the lake energy balance components in diverse physical and climatological settings. Results from lake-level validations indicated that the full lake-level model is capable of accurately simulating lake-level fluctuations over both intra- and interannual time periods.;The lake-level model was applied to simulate fluctuations in the level of Harney-Malheur Lake, Oregon between 1980 and 1986. Input to the model consisted of estimated and observed meteorological and hydrological data. Simulated lake-levels were in excellent agreement with observation data prior to and during the sharp rise of Harney-Malheur Lake. For perpetual 1983 conditions, when precipitation was 160% of the 43 year mean, a simulated equilibrium elevation of 1260m was reached after 200 years. This level exceeds the estimated elevation (1255m) of the sill that controlled outflow from Paleo Lake Malheur. For perpetual 1980 conditions, when precipitation was about equal to the 43 year mean, the model simulated a fall in lake level to an equilibrium elevation of 1249m in 15 years.
机译：湖泊水位的变化受湖泊蒸发的影响很大，这很难测量或估计。推算湖泊蒸发量估算值的一种方法是通过模拟建模。本文开发，验证了一个湖泊热力结构和能量平衡的演化模型，并将其用于模拟湖泊水位变化。该模型基于一维涡流扩散模型，该模型模拟了湖泊的变化。湖泊蓄热，由净入射辐射与跨水-大气边界的辐射，潜热和显热通量之间的平衡确定。该模型需要输入短波和长波辐射，风速，空气温度和空气蒸汽压力的数据，并模拟温度和蒸发量。不需要特定于湖泊的模型参数拟合。当该模型与湖泊的水平衡数据相结合时，也可以模拟湖泊水位的变化。;来自加利福尼亚州萨尔顿海和印第安纳州俏丽湖的验证实验表明，该模型能够准确地模拟季节性在不同的物理和气候环境中，湖泊热结构，湖泊蒸发和湖泊能量平衡成分的循环。湖泊水平验证的结果表明，完整的湖泊水平模型能够准确地模拟年内和年际时段的湖泊水平波动。;湖泊水平模型用于模拟Harney-Malheur水平的波动1980年至1986年间，俄勒冈州的莱克湖。该模型的输入由估计和观测的气象和水文数据组成。在Harney-Malheur湖急剧上升之前和期间，模拟的湖面水位与观测数据高度吻合。对于1983年的永久条件，当降水量是43年平均值的160％时，在200年后达到了模拟的平衡高度1260m。该高度超过了控制从古湖Malheur流出的门槛的估计高度（1255m）。对于1980年的永久条件，当降水量大约等于43年平均值时，该模型模拟了15年内湖泊水位下降至1249m的平衡高度。

著录项

  • 作者

    Hostetler, Steven William.;

  • 作者单位

    University of Oregon.;

  • 授予单位 University of Oregon.;
  • 学科 Physical Geography.;Hydrology.
  • 学位 Ph.D.
  • 年度 1987
  • 页码 175 p.
  • 总页数 175
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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