Toprak Nem Değişiminin HYDRUS Programı Yardımıyla Modellenmesi

Year 2014, Volume: 2 Issue: 2, 1 - 8, 01.12.2014

Kürşad Demirel

Abstract

Küresel ısınmayla birlikte su daha da önemli bir tarımsal girdi olmuştur. Tarımsal üretimde, nitelikli ve bol ürün alınabilmesi için bitkilerin yetişme koşullarını etkileyen faktörlerin ortaya konulması gerekmektedir. Toprak nemi bu faktörlerin en başında gelmektedir. Bitkilerin bu nemden yararlanabilmeleri için belli sınırlarda tutulması oldukça önemlidir. Uzaktan algılama, hassas tarım uygulamaları, yüzey ve yüzey altı su akışları, toprak–su–bitki–atmosfer modelleri güvenilir ve eş zamanlı olarak ölçülen toprak nemi değerlerine ihtiyaç duymaktadır.Arazi ve laboratuar koşullarında, toprak içerisindeki su hareketinin veya toprak nem değişiminin belirlenmesi oldukça zor ve zaman alıcıdır. Son zamanlarda, bilgisayar modelleri ile toprak neminin ve toprak içerisindeki su akışının simülasyonu daha kolay yapılabilmektedir. Bu amaçla kullanılan HYDRUS, toprak su akışının izlenmesinde en yaygın olarak kullanılan programlardan birisidir. Bu çalışmada, HYDRUS programı ve örnek bir uygulama ile programın kullanımı için gerekli verilerin tanıtılması amaçlanmıştır.

Keywords

Modelleme, HYDRUS, Toprak nemi

Modeling of the Change of Soil Moisture Using HYDRUS Program

Abstract

Water has been a more important agricultural input due to global warming. In agricultural production, in order to produce high quality and more products factors affecting plant growth should be well understood. Soil moisture is one of the most important of these factors. It is very important to keep the moisture in certain limits in order to make it beneficial for the plants. Remote sensing, precision agriculture applications, surface and subsurface water flow, soil–water–plant–atmosphere models require reliable and simultaneously measured soil moisture values. The determination of the variation of soil moisture or water movement in the soil under land and laboratory conditions is quite difficult and time consuming. In recent years, the simulation of moisture and water flow in the soil with computer models can be performed more easily. HYDRUS is one of the most commonly used programs in soil water flow tracing. In this study, it was aimed to describe the HYDRUS program and required data format along with a sample application using the program.

Keywords

Modeling, HYDRUS, Soil moisture

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