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- W2186342833 abstract "Mostly small, obscure, and frequently dry, the tens of thousands of playas scattered across western Kansas and the surrounding states (fi g. 1) have, nevertheless, collectively become recognized as one of the most vital water resources in the High Plains. What the region’s playas lack in size they make up for in quantity. Individually, they are far outsized by more familiar desert playas. California’s Rogers Dry Lake at Edwards Air Force Base covers 44 square miles and has been used to land space shuttles. Kansas’ largest playa, in Finney County, covers less than a square mile (Bowen et al., in press). Overall, however, the High Plains region of the southern Great Plains has the highest concentration of playas in the world. Together these playas provide thousands of important, if transient, wetland environments as well as much-needed ground-water recharge in a region where precipitation averages less than 20 inches a year and can evaporate up to fi ve times faster than it soaks in (Gurdak and Roe, 2009). Most of the High Plains playas are dispersed throughout an area ranging north from western Texas and eastern New Mexico into Oklahoma, Kansas, Colorado, and Nebraska (fi g. 2), and overlie the extensive High Plains aquifer, which includes the Ogallala aquifer. Also called lagoons, buffalo wallows, or mud holes, the naturally occurring playas are relatively round, shallow depressions lined with clay-rich soils that differ in composition from surrounding soils. In their natural state, playas’ sole sources of water are precipitation and runoff, and during arid periods most eventually dry up. Yet following times of abundant precipitation, playas in the region retain water much longer than the adjoining semiarid, shortgrassprairie, and agricultural lands. Wet playas rejuvenate dormant wetland vegetation that supports a much greater variety of animal life than the adjacent habitats. Water captured by playas also seeps down into the underlying High Plains aquifer. More than 70% of playas in the High Plains have been modifi ed in some way since settlement started in the late-nineteenth century (PLJV, 2007). Many have been cultivated or altered for such uses as storage for feedlot runoff, tailwater pits for irrigation, grazing and watering livestock, and landfi lls. To lessen the impact of such practices, Federal and State programs have been developed to help landowners manage playas and other wetlands. Scientists also continue to study playas to better understand the long-term effects that human activities have on the region’s ecology and water supply." @default.
- W2186342833 created "2016-06-24" @default.
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- W2186342833 date "2010-01-01" @default.
- W2186342833 modified "2023-09-24" @default.
- W2186342833 title "Playas in Kansas and the High Plains" @default.
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