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| Titel |
Similarity of climate control on base flow and perennial stream density in the Budyko framework |
| VerfasserIn |
D. Wang, L. Wu |
| 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 ; 17, no. 1 ; Nr. 17, no. 1 (2013-01-25), S.315-324 |
| Datensatznummer |
250017692
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| Publikation (Nr.) |
 copernicus.org/hess-17-315-2013.pdf |
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| Zusammenfassung |
| Connection between perennial stream and base flow at the mean annual scale
exists since one of the hydrologic functions of perennial stream is to
deliver runoff even in low flow seasons. The partitioning of precipitation
into runoff and evaporation at the mean annual scale, on the first order, is
captured by the ratio of potential evaporation to precipitation
(EP/P called climate aridity index) based on Budyko hypothesis.
Perennial stream density (DP), which is obtained from the high
resolution National Hydrography Dataset, for 185 watersheds declines
monotonically with climate aridity index, and an inversely proportional
function is proposed to model the relationship between DP and
EP/P. The monotonic trend of perennial stream density reconciles
with the Abrahams curve since perennial stream density is only a small
portion of the total drainage density. The correlation coefficient between
the ratio of base flow to precipitation (Qb/P), which follows a
complementary Budyko type curve and perennial stream density is found to be
0.74. The similarity between Qb/P and DP reveals the
co-evolution between water balance and perennial stream network. |
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