We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Satellite Rainfall Estimates Over South America – Possible Applicability to the Water Management of Large Watersheds.
- Authors
Pereira Filho, Augusto J.; Carbone, Richard E.; Janowiak, John E.; Arkin, Phillip; Joyce, Robert; Hallak, Ricardo; Ramos, Camila G.M.
- Abstract
Pereira Filho, Augusto J., Richard E. Carbone, John E. Janowiak, Phillip Arkin, Robert Joyce, Ricardo Hallak, and Camila G.M. Ramos, 2010. Satellite Rainfall Estimates Over South America – Possible Applicability to the Water Management of Large Watersheds. Journal of the American Water Resources Association (JAWRA) 46(2):344-360. DOI: 10.1111/j.1752-1688.2009.00406.x This work analyzes high-resolution precipitation data from satellite-derived rainfall estimates over South America, especially over the Amazon Basin. The goal is to examine whether satellite-derived precipitation estimates can be used in hydrology and in the management of larger watersheds of South America. High spatial-temporal resolution precipitation estimates obtained with the CMORPH method serve this purpose while providing an additional hydrometeorological perspective on the convective regime over South America and its predictability. CMORPH rainfall estimates at 8-km spatial resolution for 2003 and 2004 were compared with available rain gauge measurements at daily, monthly, and yearly accumulation time scales. The results show the correlation between satellite-derived and gauge-measured precipitation increases with accumulation period from daily to monthly, especially during the rainy season. Time-longitude diagrams of CMORPH hourly rainfall show the genesis, strength, longevity, and phase speed of convective systems. Hourly rainfall analyses indicate that convection over the Amazon region is often more organized than previously thought, thus inferring that basin scale predictions of rainfall for hydrological and water management purposes have the potential to become more skillful. Flow estimates based on CMORPH and the rain gauge network are compared to long-term observed average flow. The results suggest this satellite-based rainfall estimation technique has considerable utility. Other statistics for monthly accumulations also suggest CMORPH can be an important source of rainfall information at smaller spatial scales where in situ observations are lacking.
- Subjects
SOUTH America; RAINFALL; METEOROLOGICAL precipitation measurement; WATERSHED management; HYDROMETEOROLOGICAL cycles; SPATIAL analysis (Statistics); RAIN gauges; HYDROLOGIC models; STATISTICAL correlation; MORPHING (Computer animation)
- Publication
Journal of the American Water Resources Association, 2010, Vol 46, Issue 2, p344
- ISSN
1093-474X
- Publication type
Article
- DOI
10.1111/j.1752-1688.2009.00406.x