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| Titel |
Factors influencing chloride deposition in a coastal hilly area and application to chloride deposition mapping |
| VerfasserIn |
H. Guan, A. J. Love, C. T. Simmons, O. Makhnin, A. S. Kayaalp |
| 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 ; 14, no. 5 ; Nr. 14, no. 5 (2010-05-26), S.801-813 |
| Datensatznummer |
250012302
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| Publikation (Nr.) |
 copernicus.org/hess-14-801-2010.pdf |
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| Zusammenfassung |
| Chloride is commonly used as an environmental tracer for studying water flow
and solute transport in the environment. It is especially useful for
estimating groundwater recharge based on the commonly used chloride mass
balance (CMB) method. Strong spatial variability in chloride deposition in
coastal areas is one difficulty encountered in appropriately applying the
method. A high-resolution bulk chloride deposition map in the coastal region
is thus needed. The aim of this study is to construct a chloride deposition
map in the Mount Lofty Ranges (MLR), a coastal hilly area of approximately
9000 km2 spatial extent in South Australia. We examined geographic
(related to coastal distance), orographic, and atmospheric factors that may
influence chloride deposition, using partial correlation and regression
analyses. The results indicate that coastal distance, elevation, as well as
terrain aspect and slope, appear to be significant factors controlling
chloride deposition in the study area. Coastal distance accounts for 70%
of spatial variability in bulk chloride deposition, with elevation, terrain
aspect and slope an additional 15%. The results are incorporated into a
de-trended residual kriging model (ASOADeK) to produce a 1 km×1 km
resolution bulk chloride deposition and concentration maps. The average
uncertainty of the deposition map is about 20–30% in the western MLR, and
40–50% in the eastern MLR. The maps will form a useful basis for
examining catchment chloride balance for the CMB application in the study
area. |
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