Assimilation of remotely sensed soil moisture into a hydrologic model

Author

Bolten, John ; Lakshmi, Venkat

Author_Institution

Dept. of Geol. Sci., South Carolina Univ., Columbia, SC

Volume

3

fYear

2004

fDate

20-24 Sept. 2004

Firstpage

1874

Abstract

We discuss the assimilation of remotely sensed soil brightness temperature into a runoff prediction model. Data used in this study was acquired during the 2002 Soil Moisture Experiments (SMEX02) near Ames, IA. The Passive and Active L- and S-band (PALS) instrument was flown for six days of the study before and after a major rain event in the region. We combine a radiative transfer model and observed PALS brightness temperatures to estimate soil moisture within the top five centimeters over watershed. These estimates are assimilated into the active soil layer in a distributed runoff model. Runoff estimates are compared to observed stream gauge measurements within the watershed

Keywords

hydrological techniques; moisture; remote sensing by radar; soil; synthetic aperture radar; vegetation mapping; 6 day; AD 2002; Ames; PALS brightness temperatures; PALS instrument; Passive and Active L- and S-band instrument; SMEX02; Soil Moisture Experiments; active soil layer; distributed runoff model; hydrologic model; radiative transfer model; remotely sensed soil moisture assimilation; runoff prediction model; soil brightness temperature; Brightness temperature; Hydrologic measurements; Hydrology; Instruments; Passive microwave remote sensing; Predictive models; Remote sensing; Soil measurements; Soil moisture; Vegetation mapping;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004 IEEE International

Conference_Location

Anchorage, AK

Print_ISBN

0-7803-8742-2

Type

conf

DOI

10.1109/IGARSS.2004.1370705

Filename

1370705