FLOW STRUCTURES DETERMINING RIVER LEVEL IN AN ESTUARY

决定河口河流水位的水流结构

基本信息

  • 批准号:
    13450199
  • 负责人:
  • 金额:
    $ 4.35万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    2001
  • 资助国家:
    日本
  • 起止时间:
    2001 至 2003
  • 项目状态:
    已结题

项目摘要

It is essential to find the correct relationship between flow rate and river level in order to have information about the flow rate during flood and about uses of the river water like agriculture and hydroelectric generation. Normally, the river flow rate is assumed to be given by the level through the empirical H-Q equation, where H is the water level (height) and Q is the flowrate, but during drought, it becomes extremely more difficult to apply this expression to the estuary than to locations upstream. This is because the river level can take a large range of values under the influence of the four key factors of tide, atmospheric pressure, wind direction and wind speed. In this study, it was attempted to derive a method for quantitative estimation of the effects of tide, atmospheric pressure, wind direction and wind speed on flowrate in the estuary of the Ishikari River, where these four factors dramatically lower the correlation between water level (H) and river flowrate (Q). It was found that the effect of tide and atmospheric pressure on sea level is almost exactly reflected in the fluctuations of river level. Data from observations of river level under windless conditions and steady river flowrate allowed application of empirical rules for river rise due purely to flowrate, providing a quantitative estimate of the relation between wind and river behavior. Next, the flowrate was estimated at a certain location using the obtained quantitative relation between the four factors and river level, and this was found to be nearly identical to the observed flowrate. This confirmed the practical validity of this study.
为了获得洪水期间的流量以及农业和水力发电等河水用途的信息,必须找到流量和河流水位之间的正确关系。通常情况下,河流流量被假定为通过经验 H-Q 方程由水位给出,其中 H 是水位(高度),Q 是流量,但在干旱期间,将该表达式应用于河口比应用于上游位置变得极其困难。这是因为在潮汐、气压、风向、风速四个关键因素的影响下,河流水位可以取较大范围的值。在本研究中,试图导出一种定量估计潮汐、气压、风向和风速对石狩川河口流量影响的方法,这四个因素显着降低了水位(H)和河流流量(Q)之间的相关性。研究发现,潮汐和气压对海平面的影响几乎完全反映在河流水位的波动上。在无风条件和稳定河流流量下对河流水位进行观测所得的数据允许应用纯粹由流量引起的河流上升的经验规则,从而提供风与河流行为之间关系的定量估计。接下来,利用获得的四个因素与河流水位之间的定量关系来估计某个位置的流量,发现这与观测流量几乎相同。这证实了本研究的实际有效性。

项目成果

期刊论文数量(32)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
吉田静男, 西田修三, 横尾啓介: "石狩川の密度成層構造と地形,気象,海象-XI"福田水文センター(印刷中). (2004)
Shizuo Yoshida、Shuzo Nishida、Keisuke Yokoo:“石狩川 XI 的密度分层结构和地形、天气和海洋现象”福田水文中心(2004 年)。
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    0
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S.Yoshida, K.Yokoo, S.Nishida, Y.Nakamichi: "Fukuda Suimon Corp."Stratified Flow Strictures Affected by Topology, Weather and Sea Condition at the Mouth of Ishikari River-IX (in Japanese). 348 (2002)
S.Yoshida、K.Yokoo、S.Nishida、Y.Nakamichi:“Fukuda Suimon Corp.”石狩河口受拓扑、天气和海况影响的分层流限制 - IX(日文)。
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    0
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吉田静男, 西田修三, 横尾啓介, 中道陽文: "石狩川の密度成層構造と地形,気象,海象-IX"福田水文センター. 348 (2002)
Shizuo Yoshida、Shuzo Nishida、Keisuke Yokoo、Yobumi Nakamichi:“石狩川-IX的密度分层结构和地形、天气和海洋现象”福田水文中心348(2002)。
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    0
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吉田静男, 西田修三, 横尾啓介, 中道陽文: "石狩川の密度成層構造と地形,気象,海象-X"福田水文センター. 397 (2003)
Shizuo Yoshida、Shuzo Nishida、Keisuke Yokoo、Yobumi Nakamichi:“石狩川X的密度分层结构和地形、天气和海洋现象”福田水文中心397(2003)。
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    0
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  • 通讯作者:
吉田静男, 酉田修三, 横尾啓介: "石狩川の密度成層構造と地形,気象,海象-XI"福田水文センター(印刷中). (2004)
Shizuo Yoshida、Shuzo Torita、Keisuke Yokoo:“石狩川 XI 的密度分层结构和地形、天气和海洋现象”福田水文中心(2004 年)。
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YOSHIDA Shizuo其他文献

YOSHIDA Shizuo的其他文献

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{{ truncateString('YOSHIDA Shizuo', 18)}}的其他基金

Entrainment Phenomena in a Stratified Flow with Average Velocities and Turbulent Surface Layers
具有平均速度和湍流表面层的分层流中的夹带现象
  • 批准号:
    09450186
  • 财政年份:
    1997
  • 资助金额:
    $ 4.35万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
An existence of cold stable vacuolar H^+-ATPase in Plants and its structural properties.
植物冷稳定液泡H^-ATP酶的存在及其结构特性。
  • 批准号:
    05454012
  • 财政年份:
    1993
  • 资助金额:
    $ 4.35万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)
UNSTEADY FACTORS AFFECTING SALT DIFFUSION IN THE STRATIFIED FLOW SYSTEM AT A RIVER MOUTH
影响河口层流系统盐分扩散的不稳定因素
  • 批准号:
    04452231
  • 财政年份:
    1992
  • 资助金额:
    $ 4.35万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)
Effects of cold-induced dysfunction of vacuoles upon homeostasis in intracellular ionic environment.
寒冷诱导的液泡功能障碍对细胞内离子环境稳态的影响。
  • 批准号:
    03454005
  • 财政年份:
    1991
  • 资助金额:
    $ 4.35万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)
Studies on plasma membrane proteins which are specifically induced by cold acclimation in plants.
植物冷驯化特异性诱导的质膜蛋白的研究。
  • 批准号:
    01480009
  • 财政年份:
    1989
  • 资助金额:
    $ 4.35万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)
Molecular mechanisms of chilling injury and freezing injury
冷害和冻害的分子机制
  • 批准号:
    62304004
  • 财政年份:
    1987
  • 资助金额:
    $ 4.35万
  • 项目类别:
    Grant-in-Aid for Co-operative Research (A)
Time-Space Variations of Hydraulic Parameters and Mixing Processes at the Density interface of River Mouth Flows
河口流密度界面水力参数及混合过程的时空变化
  • 批准号:
    62460158
  • 财政年份:
    1987
  • 资助金额:
    $ 4.35万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)
Studies on deformation mechanisms of regional metamorphic rocks by means of microfabric analyses
区域变质岩变形机制的微结构分析研究
  • 批准号:
    61420015
  • 财政年份:
    1986
  • 资助金额:
    $ 4.35万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (A)
Development of a laser optical cryomicroscope for the study of freeze-preservation of plant gene resources.
开发用于植物基因资源冷冻保存研究的激光光学冷冻显微镜。
  • 批准号:
    60840020
  • 财政年份:
    1985
  • 资助金额:
    $ 4.35万
  • 项目类别:
    Grant-in-Aid for Developmental Scientific Research

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