Analisa Model Evaporasi dan Evapotranspirasi Menggunakan Pemodelan Matematika pada Visual Basic di Kabupaten Maros

Abstract

The approach to calculating evaporation and evapotranspiration, both potential and actual, varies widely. The models used to estimate the amount of evapotranspiration, particularly at the Maros Climatology Station, Maros Regency, South Sulawesi. Evaporation models use the Penman, Priestley, Bruin, and Valiantzas models while evapotranspiration models use the Penman, Hargreaves, Jensen-Haise, Penman-Monteith, Radiation, Turc, and Makkink models, where all of these methods use climate data, such as are the minimum temperature (Tn), maximum temperature (Tx), air temperature (Ta), average humidity (RH), rainfall (R), duration of sun exposure (SS), and maximum wind speed (U) in calculations using Visual basic program in Microsoft Excel in the form of code. Thus, it is necessary to conduct an analysis of the suitability of the model to the results of the observations in order to find out which model is suitable according to the results of the largest coefficient of determination (R2). Based on the results of the model suitability analysis, a selected model was obtained, namely the Valiantzas model with a value of 0.980 in the evaporation calculation and the Jensen-Haise model, namely 0.889.

The Effect of Land Cover Changes on Surface Runoff Using the Soil and Water Assessment Tool in the Bila Watershed

“…The water cycle in 2016 shows that the largest amount of water coming out of the Bila watershed is caused by the evapotranspiration process. Evapotranspiration is the amount of water that is returned to the atmosphere from the soil surface, water bodies, and vegetation due to the influence of climatic and physiological vegetation factors [17]. The relatively high area of forested land cover in the Bila watershed is the reason for the high evapotranspiration value.…”

Water Footprint Analysis of Paddy Cultivation by Subsurface Irrigation in a Greenhouse

“…Crop water requirement is the amount of water used in fulfilling water needs that have been used up in processes that occur in plants, such as evapotranspiration. Evapotranspiration value covers potential evapotranspiration and crop evapotranspiration [10]. Referring to [11], the calculation of potential evapotranspiration may be performed using the Hargreaves model with equation (4) below.…”

Analisis Karakteristik Iklim Dan Hujan Pada Lahan Pertanian Di Kecamatan Kediri Kabupaten Lombok Barat

“…Besar kecilnya evaporasi yang terjadi dipengaruhi oleh faktor-faktor meteorologi sebagai berikut (Fausan et al, 2021) dengan intens dengan adanya panas yang terperangkap dalam bumi dan juga dengan adanya penyinaran langsung dari matahari. Pada saat kondisi matahari terhalang oleh awan, maka radiasi dari sinar matahari akan mengalami hambatan sehingga menghambat evaporasi.…”