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İstanbul Teknik Üniversitesi (2015)

Evaluation Of Three Semi-empirical Soil Moisture Estimation Models In Agriculture Areas With Radarsat-2 Imagery Processing In The Southeast Of Turkey

BEHNAM MAKOEI Elnaz

Titre : Evaluation Of Three Semi-empirical Soil Moisture Estimation Models In Agriculture Areas With Radarsat-2 Imagery Processing In The Southeast Of Turkey

Güneydoğu Türkiye Tarımsal Alanlarında, Radarsat-2 Uydu Görüntülerinin İşlenmesi İle Yarı-deneysel, Üç Toprak Nemi Tahmin Modelinin Geliştirilmesi

Auteur : BEHNAM MAKOEI Elnaz

Université de soutenance : İstanbul Teknik Üniversitesi

Grade : Master of Science (MS) 2015

Résumé
Soil moisture or soil water content is an important factor and parameter for agricultural, hydrologicaland meteorological applications. Usually the soil moisture definition is, divided into two branches : deep or root zonesoil moisture, and surface soil moisture.Surface soil moisture is refers to the water that is in the upper 10 cm of soil and only constitutes 0.0012% of all water available on Earth(Verhoest et al., 2008). Whereas root zone soil moisture is the water that is available to plants, which is generally considered to be in the upper 200 cm of soil. The water stored in the soil has different roles in the global water cycle. For instance, the growth of plants, irrigation scheduling management, good product, crisis management during drought, etc. Or, it controls the partitioning of rainfall into runoff and infiltration. Runoff commonly means both exporting fresh water to other areas and degradation of topsoil through leaching and erosion(surface moisture),infiltration mean filling underground aquifers (deep soil moisture) (Verhoest et al., 2008). It has been widely observed that soil moisture is also a key variable in flood forecasting.However, the measurement of soil moisture is very important in other branches of science. Methods for measuring the mass of soil water have been in use since the 15th Century. Today, the most common method is with regard to the mass, volume or saturation of the soil. There are various methods available to measure the soil moisture content both directly and indirectly (Stachder 1996, Prietzsch 1998, Marshall 1999). In principle, direct and indirect methods of measurement can be distinguished from one another. Direct methods include all measured processes in which the soil water is removed via evaporation, extraction, or chemical reactions and gravimetric method such as the FDR or TDR methods. On the other hand, research in to the remote sensing of soil moisture began in the mid 1970’s thanks to a surge in the development of satellite technology.

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