SOIL WATER ASSESSMENT USING A P-BAND SCATTEROMETER AND ERS-2 SAR D. G. Blumberg (1), J. Ben-Asher(1) ,G. Ronen(1), M. Sprintsin(1), V. Freilikher(2), L. Volfson(2), and A. Kotlyar(2). (1) Ben-Gurion University of the Negev, P.O. Box 653, Beer Sheva 84105, Israel. E-mail:
[email protected] (2) Bar-Ilan University , , Ramat Gan, Israel ABSTRACT/RESUME Soil water content is an important component that influences meso- and micro scale processes. The agricultural capacity of a site is directly affected by soil water content and is especially important in arid regions. Furthermore, climate studies face the never ending problem of trying to lay a hand on climate surface conditions. Many of these are not measured continuously and thus are not available. One of the more important parameters is soil water-content. In this study we mapped soil water content in the Negev Desert using ERS-2 with multiple look directions and utilized a P-band scatterometer. Results show water content values ranging from 4-20% volumetric, with a high correlation to ground measurements. 1. INTRODUCTION Soil water content is an important component that influences meso- and micro scale processes. The most developed models for extracting soil water-content are those that utilize polarimetric SAR data. However, the wavelengths most insensitive to surface roughness and thus, most sensitive to soil water content are the longer wavelengths (i.e., P-band). These are not readily available in Space and therefore different methods need to be used at this time. The use of archival spaceborne data provides the possibility of reprocessing data acquired in the past and reconstructing missing surface data.