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    • Journal of Range Management, Volume 53 (2000)
    • Journal of Range Management, Volume 53, Number 4 (July 2000)
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    Hydrologic responses of shortgrass prairie ecosystems

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    Author
    Weltz, L.
    Frasier, G.
    Weltz, M.
    Issue Date
    2000-07-01
    Keywords
    loam soils
    clay soils
    steppe soils
    range condition
    rain
    South Dakota
    runoff
    sandy loam soils
    rainfall simulators
    Texas
    prairies
    biomass
    plant litter
    rangelands
    canopy
    New Mexico
    Colorado
    runoff
    rainfall simulation
    hydrograph
    time-to-peak
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    Citation
    Weltz, L., Frasier, G., & Weltz, M. (2000). Hydrologic responses of shortgrass prairie ecosystems. Journal of Range Management, 53(4), 403-409.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/643781
    DOI
    10.2307/4003751
    10.2458/azu_jrm_v53i4_weltz
    Additional Links
    https://rangelands.org/
    Abstract
    Runoff hydrographs from 3 separate rainfall simulation runs at 11 different shortgrass prairie sites were evaluated to determine the hydrologic similarity within a single ecosystem at widely separated sites. There were no consistent patterns in the equilibrium runoff among sites and simulator runs. When the sites were stratified by soil type, there were differences in time-to-peak of the runoff event and the regression slope of the rising limb of the runoff ratios. Spearman's rank correlation showed no relation of the rising limb slope regression coefficient to measured vegetative characteristics across all sites. There was minimal correlation between the runoff regression coefficient and the percent cover and bare soil. Differences in the biotic components of the sites were not useful in predicting runoff characteristics. If equilibrium runoff was the measured hydrologic response, the sites were dissimilar. Using the time-to-peak and slope of the rising limb components of the runoff hydrograph, the sites were similar on the same soil type. The technique of comparing components of the runoff hydrograph, other than equilibrium runoff has promise to allow one to quickly compare responses among ecosystems to determine if they have similar hydrological functions. Our study on shortgrass prairie sites indicated that easily estimated factors such as biomass, cover and litter were not good indicators of hydrologic function. Also, it is necessary to identify which portion of the runoff event is most important in the assessment. Future hydrologic and erosion models need to develop nonlinear prediction equations to estimate infiltration rates as a function of cover, biomass, and soil properties and also to stratify soils into functional units to accurately estimate runoff rates.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4003751
    Scopus Count
    Collections
    Journal of Range Management, Volume 53, Number 4 (July 2000)

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