Impact of forest degradation on streamflow regime and runoff response to rainfall in the Garhwal Himalaya, Northwest India

N.U.Q. Qazi, L.A. Bruijnzeel, S.P. Rai, C.P. Ghimire

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)

Abstract

Baseflows have declined for decades in the Lesser Himalaya but the causes are still debated. This paper compares variations in streamflow response over three years for two similar headwater catchments in northwest India with largely undisturbed (Arnigad) and highly degraded (Bansigad) oak forest. Hydrograph analysis suggested no catchment leakage, thereby allowing meaningful comparisons. The mean annual runoff coefficient for Arnigad was 54% (range 44–61%) against 62% (53–69%) at Bansigad. Despite greater total runoff Qt (by 250 mm year–1), baseflow at Bansigad ceased by March, but was perennial at Arnigad (making up 90% of Qt vs. 51% at Bansigad). Arnigad storm flows, Qs, were modest (8–11% of Qt) and occurred mostly during monsoons (78–98%), while Qs at Bansigad was 49% of Qt and occurred also during post-monsoon seasons. Our results underscore the importance of maintaining soil water retention capacity after forest removal to maintain baseflow levels.
Original languageEnglish
Pages (from-to)1114-1130
JournalHydrological sciences journal
Volume62
Issue number7
DOIs
Publication statusPublished - 25 Apr 2017

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baseflow
streamflow
runoff
rainfall
degradation
monsoon
catchment
water retention
hydrograph
headwater
leakage
soil water

Keywords

  • METIS-322153
  • ITC-ISI-JOURNAL-ARTICLE

Cite this

Qazi, N.U.Q. ; Bruijnzeel, L.A. ; Rai, S.P. ; Ghimire, C.P. / Impact of forest degradation on streamflow regime and runoff response to rainfall in the Garhwal Himalaya, Northwest India. In: Hydrological sciences journal. 2017 ; Vol. 62, No. 7. pp. 1114-1130.
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Impact of forest degradation on streamflow regime and runoff response to rainfall in the Garhwal Himalaya, Northwest India. / Qazi, N.U.Q.; Bruijnzeel, L.A.; Rai, S.P.; Ghimire, C.P.

In: Hydrological sciences journal, Vol. 62, No. 7, 25.04.2017, p. 1114-1130.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Qazi, N.U.Q.

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AU - Ghimire, C.P.

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