The development of evapotranspiration for upland irrigation planning by the AMeDAS meteorolgical data

利用 AMeDAS 气象数据制定旱田灌溉规划蒸散量

基本信息

批准号：
11660243
负责人：
MIURA Takeshi
金额：
$ 2.18万
依托单位：
Okayama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

A reference evapotransipiration that is the most important factor in upland field irrigation is calculated by the Penman's method using the meteorological data. There are about 840 weather stations in Japan where air temperature, solar radiation, and so on are measured. Those data have been measured for about 20 years since the start of AMeDAS measurement and can be used for the Penman' equation. The objective of this study was to develop a database on the hard disk in a computer to take out the necessary data from the database. The user can select the target observation location, meteorological factors, and the observation term and can calculate the average values, the cumulative values, and the reference evaporation by Penman's equation. Those results are output into a data file and displayed as a contour map or a plot of equi-values. The system program was coded by a Microsoft Visual Basic language.On the other hand, the crop coefficient is needed to estimate the actual evapotranspi … More ration using a reference evapotranspiration calculated by the Penman's equation. In Japan, there are few data of crop coefficients for various kinds of crops, and therefore it is needed to measure much more data for the detailed upland irrigation planning. Dr. Miura who is a head investigator has measured the evapotranspiration at different upland fields using the micrometeorological method and rearranged those results as crop coefficients. Furthermore, he has set up the long-term measurement system of radiation balance to test the predictive equation of net radiation based on measured values. The differences of sunshine duration due to the different instruments of heliograph have reported, however, the result for the predictive equation of net radiation has not reported.In this report, some papers that have already been published are classified into four categories, that is, the relationship between AMeDAS and Penman's equation, the measurement of micrometeorology in upland field, the upland field irrigation, and the meteorological environment. More papers will be published in the future. Less

使用气象数据，由Penman的方法计算出是高地现场灌溉中最重要因素的参考蒸发液。在日本，大约有840个气象站，在这里测量空气温度，太阳辐射等。自AMEDAS测量开始以来，这些数据已被测量约20年，可用于Penman的等效性。这项研究的目的是在计算机上的硬盘上开发数据库，以从数据库中获取必要的数据。用户可以选择目标观察位置，气象因素和观察项，并可以计算penman方程的平均值，累积值和参考蒸发。这些结果被输出到数据文件中，并以等高图或等电位图显示。系统程序是由Microsoft Visual Basic语言编码的。另一方面，需要该系数来估算实际的Evapotranspi…使用由Penman方程计算的参考蒸发量进行更多的评估。在日本，对于各种农作物来说，农作物核心的数据很少，因此需要测量更多数据以详细升级灌溉计划。负责人Miura博士使用微管道学方法测量了不同高地领域的蒸散量，并将这些结果重新排列为作物核心。此外，他已经建立了辐射平衡的长期测量系统，以基于测量值测试净辐射的预测方程。然而，由于净辐射的预测方程式的结果尚未报告。在本报告中，净辐射方程的结果差异。将来将发表更多论文。较少的