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Portail d'information géographique

Résultats de la recherche (4 résultats)

Response of extreme floods in the southwestern United States to climatic variations in the late Holocene

A regional synthesis of paleoflood chronologies on rivers in Arizona and southern Utah reveals that the largest floods over the last 5000 years cluster into distinct time periods that are related to regional and global climatic fluctuations
1997

Extracting Holocene paleohydrology and paleoclimatology information from modern extreme flood events : an example from southern California

and reveal the anomalous synoptic climatology which causes regional extreme storms. Through the analysis and understanding of basin and regional hydroclimatology the AA. determine the nature of the hydroclimatic change that must have occurred in the region
1997

Geomorphic response to minor cyclic climate changes, San Diego County, California

This paper summarizes a reconnaissance study of geomorphic response to the recent wet interval of 1978-1983 in interior regions of San Diego County. Understanding the effects of short-term, episodic changes in climate on landforms will permit
and dry intervals can have dramatic human implications for hazard planning and development in this rapidly growing region.
1997

Discontinuous ephemeral streams

Many ephemeral streams in western North America flowed over smooth valley floors before transformation from shallow discontinuous channels into deep arroyos. These inherently unstable streams of semiarid regions are sensitive to short-term climatic
1997