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| Titel |
Future directions for hydropedology: quantifying impacts of global change on land use |
| VerfasserIn |
M. J. Vepraskas, J. L. Heitman, R. E. Austin |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 13, no. 8 ; Nr. 13, no. 8 (2009-08-12), S.1427-1438 |
| Datensatznummer |
250011967
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| Publikation (Nr.) |
 copernicus.org/hess-13-1427-2009.pdf |
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| Zusammenfassung |
| Hydropedology is well positioned to address contemporary issues resulting
from climate change. We propose a six-step process by which digital,
field-scale maps will be produced to show where climate change impacts will
be greatest for two land uses: a) home sites using septic systems, and b)
wetlands. State and federal laws have defined critical water table levels
that can be used to determine where septic systems will function well or
fail, and where wetlands are likely to occur. Hydrologic models along with
historic rainfall and temperature data can be used to compute long records
of water table data. However, it is difficult to extrapolate such data
across land regions, because too little work has been done to test different
ways for doing this reliably. The modeled water table data can be used to
define soil drainage classes for individual mapping units, and the drainage
classes used to extrapolate the data regionally using existing digital soil
survey maps. Estimates of changes in precipitation and temperature can also
be input into the models to compute changes to water table levels and
drainage classes. To do this effectively, more work needs to be done on
developing daily climate files from the monthly climate change predictions.
Technology currently exists to use the NRCS Soil Survey Geographic (SSURGO)
Database with hydrologic model predictions to develop maps within a GIS that
show climate change impacts on septic system performance and wetland
boundaries. By using these maps, planners will have the option to scale back
development in sensitive areas, or simply monitor the water quality of these
areas for pathogenic organisms. The calibrated models and prediction maps
should be useful throughout the Coastal Plain region. Similar work for other
climate-change and land-use issues can be a valuable contribution from
hydropedologists. |
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