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| Titel |
Assessing ecological land use and water demand of river systems: a case study in Luanhe River, North China |
| VerfasserIn |
D. H. Yan, G. Wang, H. Wang, T. L. Qin |
| 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 ; 16, no. 8 ; Nr. 16, no. 8 (2012-08-06), S.2469-2483 |
| Datensatznummer |
250013406
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| Publikation (Nr.) |
 copernicus.org/hess-16-2469-2012.pdf |
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| Zusammenfassung |
| Economic and social development has greatly increased ecological water
demand and modified land use of river systems worldwide, causing overall
degradation of many of these systems. In this study, theoretical and
technical frameworks for regionalization on the eco-environmental function
of river systems are formulated and applied to the Luanhe River system.
Based on its eco-environmental functions, this river can be regionalized
into four types of first-class functional areas: ecological preservation
areas, habitat restoration areas, ecological buffer areas and development
and utilization areas. Considering the overall eco-environmental functions,
we assessed the ecological land use of the Luanhe River system. The total
area of basic ecological land use is 876.98 km2; the restrictive
ecological land use is 1745.52 km2; ecological land use of the river
system returned from farmland is 284.25 km2; and that returned from
construction land is 17.35 km2. The average minimum ecological flow of
mainstreams in upper and middle reaches of the Luanhe River is 4.896 m3 s−1
based on the habitat method. And the recommended minimum and
suitable annual ecological water demand of channels in the lower reaches are
391 million m3 and 819.5 million m3, respectively. The evaporation
and seepage consumption and vegetation consumption in riparian zones of the
Luanhe River system are approximately 132.6 million m3 and 145.3 million m3
per year, respectively. Our results suggest that is crucial
to regulate the instream ecological water use of the Luanhe River's
mainstream starting from the Panjiakou-Daheiting Reservoir system. We
recommend accelerating ecological land-use planning and strengthening the
regulation of ecological water use on this river system focusing on
important lower reaches under the condition of competitive water demand. |
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