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題 名 | 嘉義地區作物需水量推估之研究 |
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作 者 | 陳清田; | 書刊名 | 農業工程學報 |
卷 期 | 37:1 1991.03[民80.03] |
頁 次 | 頁82-109 |
分類號 | 434.287 |
關鍵詞 | 作物; 嘉義; 需水量; |
語 文 | 中文(Chinese) |
中文摘要 | 在水資源規劃上,作物需水量不但是水資源規劃利用之重要因數,更是農業灌溉計畫研擬營運管理之依據。因此,如何有效快速地測算作物需水量,乃當今灌溉事業之首務。本文嘗試以氣象資料來做算作物需水量,此法非但可靠且甚快速,並可取代經年累月之直接試驗,常為農業先進國家廣泛之重視與採用。 本文係以各種不同之蒸發散模式來估算作物需水量,並以嘉義地區之立地條件與嘉義氣象站74年至78年等5年之氣象資料,確立該區風速函數之地域性參數,且藉由各模式結果與當地A型蒸發?做直線迴歸,比較在同樣的氣候條件下,兩者之相關性。並利用相對敏感度□分析各氣象因子對模式影響程度,期能建立適用於估算嘉義區作物需水量之最佳模式,同時與鄰近學甲試驗站之試驗資料作一比較分析,確立嘉南推估作物需水量之最佳模式。 結果顯示: 1. 風速函數地域性參數為□ 2. 推估嘉義區作物需水量之最佳模式建議採用修正之Penman模式,因其相關係數R為最高:□ 3. 由敏感度分析結果可知,溫度對所有模式影響程度為最高,亦即對模式之重要性最大。 |
英文摘要 | Evapotranspiration of crop is not only an important factor in water resources planning but also a basis of an agricultural irrigation management and operation. Therefore, how to effectively and rapidly estimate evapotranspiration of crop is the first priority in irrigation business. This study is trying to estimate evapotranspiration of crop by using climatological data. It is not only much more reliable and rapid than that of actual long-term direct measuring in the field, but also extensively concerned and taken by the advanced agriculture countries few years ago. A few evaporation models have been used to compare the model which the evapotranspiration of crop in Chia-I area is established. The parameter of wind function was used in local geographic condition and the climatological data from 1985 to 1989. Then compare the results from each model with that from class A pan by using linear regression analysis to calculate the correlation between them under the same climatological condition. Finally, use the relative sensitivity, s=(df/dx)(x/f), to analyse the extend that each climatological factor effecting on each model, suitable estimating on evaportanspiration of crop in Chia-I area. The model is also suitable to use in Chia-Nan area by putting the test data taken from Hsueh-Chia experiment station.. 1. The local parameter of wind function in Chia-I area is □ 2. The optimum model for estimating on evapotranspiration of crop in Chia-I area is the modified “Penman model”: □ 3. Temperature is the most sensitive one among climatological factors for all evaporation of ET models. |
本系統中英文摘要資訊取自各篇刊載內容。