Title :
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
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;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004 IEEE International
Conference_Location :
Anchorage, AK
Print_ISBN :
0-7803-8742-2
DOI :
10.1109/IGARSS.2004.1370705
