Impacts of Hurricane Mitch on Water Quality and Sediments of Lake Izabal, Guatemala

Von Michot, Thomas C & R.G. Boustany, A. Arrivillaga & B. Perez

USGS Open File Report, v. 3(n. 180), pp. 1-20 (2002)


" Aerial and ground surveys were conducted at Lake Izabal and Boca del Polochic to determine if impacts from Hurricane Mitch (October/November 1998) could be detected in wetland vegetation, water quality, or sediment stratigraphy. We sampled six water quality and eight sediment sites to assess impacts. Overall, we found no apparent evidence of Hurricane Mitch impact in the sediment cores or water quality. We found dissolved oxygen levels to be surprisingly good, and stratification in the water column was only shown at the offshore site. Sediment cores revealed multiple depositional layers, but nothing that could be obviously attributed to Hurricane Mitch. We were coring to a maximum depth of 60 cm, which may have been too shallow to observe the sedimentation event that occurred 2 years earlier as a result of the massive flooding reported during the storm. We observed peat layers at the mouth of the river, which probably delineated relatively normal weather events that had occurred over the past rainy season rather than older events. It seems that sedimentation and accretion processes in the delta are rapid; therefore, it is possible that our analysis was too late to detect any sedimentation event that would have occurred as result of Hurricane Mitch "

Bemerkungen: Paper denoting some ecology parameters for Lake Izabal (Juan Miguel Artigas Azas, 11-Juli-2015).

Klassifizierung: Ökologie und Umwelt, Mittel- und Nordamerika.

Sprache: English

Michot, Thomas C & R.G. Boustany, A. Arrivillaga & B. Perez. 2002. "Impacts of Hurricane Mitch on Water Quality and Sediments of Lake Izabal, Guatemala". USGS Open File Report. v. 3(n. 180), pp. 1-20 (crc06784) (Kurzfassung)