• 한국방재학회:학술대회논문집
• /
• 2010.02a
• /
• pp.103.2-103.2
• /
• 2010

Soil Moisture Experiment(SMEX)는 2002년부터 2005년까지 해마다 실측치, 항공기 및 원격탐사를 이용하여 토양수분을 관측 및 평가하고 지표와 대기의 수문학적 연구를 위해 기초가 되는 토양수분 자료를 제공한다. 우리나라도 토양수분에 관한 연구가 있지만 원격탐사를 이용한 접근은 적다. 본 연구에서는 SMEX02의 Polarimetric Scanning Radiometer(PSR) 데이터와 In-situ 데이터를 사용가능한 4개 지점에 대하여 비교 분석을 실시하였다. C-band의 토양수분은 10cm 깊이에서 유의함을 보여 주고, 검정을 통하여 토양수분의 분포형은 정규분포 보다 대수정규분포와 Gumbel 분포가 더 유의함을 알 수 있었다.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.30 no.5B
• /
• pp.487-495
• /
• 2010

Soil moisture is a crucial factor in hydrological system which influences runoff, energy balance, evaporation, and atmosphere. United States National Aeronautic and Space Administration (NASA) and Department of Agriculture (USDA) have established Soil Moisture Experiment (SMEX) since 2002 for the global observations. SMEX provides useful data for the hydrological science including soil moisture and hydrometeorological variables. The purpose of this study is to investigate the relationship between remotely sensed soil moisture data from aircraft and satellite and ground based experiment. C-band of Polarimetric Scanning Radiometer (PSR) that observed the brightness temperature provides soil moisture data using a retrieval algorithm. It was compared with the In-situ data for 2-30 cm depth at four sites. The most significant depth is 2-10 cm from the correlation analysis. Most of the sites, two data are similar to the mean of data at 10 cm and the median at 7 cm and 10 cm at the 10% significant level using the Rank Sum test and t-test. In general, soil moisture data using the C-band of the PSR was established to fit the Normal, Log-normal and Gumbel distribution. Soil moisture data using the aircraft and satellites will be used in hydrological science as fundamental data. Especially, the C-band of PSR will be used to prove soil moisture at 7-10 cm depths.