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Meteolol Ical数据计算出高地领域的最大因素的参考蒸发，在日本有大约840个天气站，其中Aire Aire Aire是温度，太阳辐射等等AMEDAS测量的年份，并用于计算机中的硬盘。值，累积和参考蒸发，这些结果被输出到等电位。 A. Miura博士的均等系数使用了MicromeTEROLOGY方法，在不同的Uprand田地上测量了这些结果。然而，对于射射仪的不同报道，辐射的结果尚未报告。在本报告中，四个类别，即Amedas和Penman方程之间的关系，高地现场灌溉的高地田间微量历史的测量和气象环境将在未来发表。