Produccion de agua y sedimentos por impacto de ciclones tropicales, en la cuenca hidrografica del rio La Sabana, Guerrero | Production of water and sediments by impact of tropical hurricanes on the Sabana River Watershed, Guerrero State
2004
Villegas-Romero, I. | Oropeza-Mota, J.L. | Mejia-Saenz, E.
Currently, tropical hurricanes are considered to be high risk events because of the large amounts of water and sediments they bring to the watershed. From 1980 to 1997 Mexico spent 4547.2 million pesos on reconstruction of damaged zones. With the use of spatial analysis tools, the paths followed by 47 hurricanes, which crossed near by or impacted the River Sabana watershed, were drawn. Maximum rainfall during 24 h was computed for each hurricane. Furthermore, with linear regression analysis the corresponding correlations between rainfall on the watershed and runoff, and between runoff and sediment production, were obtained. It is estimated that 39 hurricanes impacted the watershed of the Sabana River from 1970 to 1997, producing 327 199 363 m3 water and 9 426 888.9 t sediment. This results in specific degradation of the watershed of 209.38 t ha(-1) for the entire period analyzed and 7.7 t ha(-1) yr(-1).
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