Water budget and run‐off response of a tropical multispecies “reforest” and effects of typhoon disturbance

Jun Zhang; L Adrian Bruijnzeel; Rogelio Tripoli; H J (Ilja) van Meerveld

doi:10.1002/eco.2055

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Water budget and run‐off response of a tropical multispecies “reforest” and effects of typhoon disturbance

Journal article

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Peer reviewed

Water budget and run‐off response of a tropical multispecies “reforest” and effects of typhoon disturbance

Jun Zhang, L Adrian Bruijnzeel, Rogelio Tripoli and H J (Ilja) van Meerveld

Ecohydrology, Vol.12(2), e2055

2019

DOI: https://doi.org/10.1002/eco.2055

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Abstract

To examine claims that reforesting degraded Imperata grassland in Leyte (Philippines) made streamflow perennial again, we studied the hydrological behaviour of a 23-year-old mixed-species 'reforest' between June 2013 and May 2014. Typhoon Haiyan, one of the strongest events ever, caused major damage to the site in November 2013. Average daily apparent water use (ET) was 5.0 mm d-1 pre-typhoon and 3.2 mm d-1 after disturbance. Corresponding ratios of period-total quickflow Qq to precipitation were 16% and 44%. Quickflow volume and peak discharge increased rapidly once a threshold value of ~250 mm for soil water storage in the top 60 cm was exceeded. Before disturbance, quickflow consisted predominantly of lateral subsurface flow due to high soil hydraulic conductivities down to 60 cm. After disturbance, shallow groundwater rose regularly to within 10 cm of the surface on foot-slopes and saturation overland flow was observed during several large storms. Comparing estimated annual ET and Qq for undisturbed conditions for the reforest and a nearby degraded Imperata grassland micro-catchment suggested that the extra infiltration following reforestation (~240 mm yr-1) exceeded the extra ET by the reforest (100-185 mm yr-1), implying a net positive trade-off (55-140 mm yr-1) and tentatively confirming local claims of improved dry-season flow.

Details

Title: Water budget and run‐off response of a tropical multispecies “reforest” and effects of typhoon disturbance
Authors: Jun Zhang (Author) - VU University, Netherlands
L Adrian Bruijnzeel (Corresponding Author) - University of the Sunshine Coast - Faculty of Arts, Business and Law
Rogelio Tripoli (Author) - Visayas State University, Philippines
H J (Ilja) van Meerveld (Author) - University of Zurich, Switzerland
Publication details: Ecohydrology, Vol.12(2), e2055
Publisher: John Wiley & Sons Ltd.
Date published: 2019
DOI: 10.1002/eco.2055
ISSN: 1936-0584
Copyright note: Copyright ©. This is the accepted version of the following article: Zhang, J, Bruijnzeel, LA, Tripoli, R, Meerveld, HJ(I). Water budget and run-off response of a tropical multispecies "reforest" and effects of typhoon disturbance. Ecohydrology. 2019; 12:e2055. https://doi.org/10.1002/eco.2055, which has been published in final form at https://doi.org/10.1002/eco.2055
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99451405102621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Ecology; Environmental Sciences; Water Resources

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