Runoff Responses Among Common Land Uses in the Uplands of Matalom, Leyte, Philippines

Chandler, D. G.; Walter, Michael

doi:10.13031/2013.17338

Cited by 50 publications

(57 citation statements)

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“…The linear relationship between discharge either from interflow or surface flow after a certain threshold in rainfall is exceeded is not uncommon as shown by Chandler and Walter (1998) for Leyte in the Philippines; and by Caballero et al (2013) for Honduras, Czech Republic and by Wickel et al (2008 for eastern Amazonia in Brazil). The linear relationship could also explain the closed lake level changes in Haiti and the Dominican Republic.…”

Section: Hydrological Similarity Of Watershedsmentioning

confidence: 96%

“…The linear relationship could also explain the closed lake level changes in Haiti and the Dominican Republic. Although the explanation of this linear relationship varies (e.g., Chandler and Walter, 1998), it seems that since rainfall intensity does not affect the relationship, direct runoff from a fixed source area with a shallow ground water table (either perched or regional) is the most likely explanation (Steenhuis FIGURE 2 | Relationship between 14-day discharge and effective precipitation (precipitation minus potential evaporation) after 500 mm. of cumulative effective precipitation occurring since the beginning of the rainy phase for three watersheds in the Ethiopian highlands (Liu et al, 2008).…”

Section: Hydrological Similarity Of Watershedsmentioning

confidence: 99%

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Improving efficacy of landscape interventions in the (sub) humid Ethiopian highlands by improved understanding of runoff processes

et al. 2015

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Despite millions of dollars invested in soil and water conservation (SWC) practices in the (sub) humid Ethiopian highlands and billions of hours of food-for-work farm labor, sediment concentration in rivers is increasing. This paper reports on the research to reverse the current trend. Based on the understanding of the hydrology of highlands, we provide evidence on sources of surface runoff and sediment and on mechanisms that govern the erosion processes and approaches and how they affect SWC practices. We suggest that priority in landscape interventions should be given to re-vegetation of the degraded areas so as to reduce the sediment concentration contributions originating from these areas. Additionally, efforts should be directed to gully rehabilitation in the saturated bottom landscape that may consist of vegetating shallow gullies and stabilizing head cuts of deeper gullies. Finally, rehabilitation efforts should be directed to increase the rain water infiltration in the upland areas through the hardpan layer by connecting the land surface to the original deep flow paths that exist below about 60 cm. It will reduce the direct runoff during the rainy season and increase baseflow during the dry season.

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Section: Hydrological Similarity Of Watershedsmentioning

confidence: 96%

Section: Hydrological Similarity Of Watershedsmentioning

confidence: 99%

Improving efficacy of landscape interventions in the (sub) humid Ethiopian highlands by improved understanding of runoff processes

et al. 2015

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“…However, although direct experimental evidence of the "infiltration trade-off hypothesis" (Bruijnzeel, 1989;Bonell et al, 2010) is missing due to a lack of comprehensive studies, demonstrated reductions in amounts of headwater-or hillslope stormflow production after reforesting severely degraded land in various parts of the tropics (e.g. Chandler and Walter, 1998;Zhou et al, 2002;Zhang et al, 2004) should be large enough to overcome the associated increases in forest water use (Chandler, 2006;cf. Bruijnzeel, 2004;Scott et al, 2005;Zhou et al, 2010).…”

Section: H E Beck Et Almentioning

confidence: 99%

“…For catchments that experienced advanced soil degradation prior to agricultural abandonment, major declines in the volumes of both total Q and quickflow (Q qf ) would be expected during forest regrowth due to much improved infiltration and retention capacities (cf. Chandler and Walter, 1998;Zhou et al, 2002). The direction and magnitude of the change in Q bf will depend on the trade-off between the changes in vegetation water use and infiltration associated with forest regeneration (Bruijnzeel, 1989;Scott et al, 2005).…”

Section: H E Beck Et Almentioning

confidence: 99%

The impact of forest regeneration on streamflow in 12 mesoscale humid tropical catchments

Beck

Bruijnzeel

Dijk

et al. 2013

Hydrol. Earth Syst. Sci.

105

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Abstract. Although regenerating forests make up an increasingly large portion of humid tropical landscapes, little is known of their water use and effects on streamflow (Q). Since the 1950s the island of Puerto Rico has experienced widespread abandonment of pastures and agricultural lands, followed by forest regeneration. This paper examines the possible impacts of these secondary forests on several Q characteristics for 12 mesoscale catchments (23-346 km 2 ; mean precipitation 1720-3422 mm yr −1 ) with long (33-51 yr) and simultaneous records for Q, precipitation (P ), potential evaporation (PET), and land cover. A simple spatially-lumped, conceptual rainfall-runoff model that uses daily P and PET time series as inputs (HBV-light) was used to simulate Q for each catchment. Annual time series of observed and simulated values of four Q characteristics were calculated. A least-squares trend was fitted through annual time series of the residual difference between observed and simulated time series of each Q characteristic. From this the total cumulative change (Â) was calculated, representing the change in each Q characteristic after controlling for climate variability and water storage carry-over effects between years. Negative values ofÂ were found for most catchments and Q characteristics, suggesting enhanced actual evaporation overall following forest regeneration. However, correlations between changes in urban or forest area and values ofÂ were insignificant (p ≥ 0.389) for all Q characteristics. This suggests there is no convincing evidence that changes in the chosen Q characteristics in these Puerto Rican catchments can be ascribed to changes in urban or forest area. The present results are in line with previous studies of mesoand macro-scale (sub-)tropical catchments, which generally found no significant change in Q that can be attributed to changes in forest cover. Possible explanations for the lack of a clear signal may include errors in the land cover, climate, Q, and/or catchment boundary data; changes in forest area occurring mainly in the less rainy lowlands; and heterogeneity in catchment response. Different results were obtained for different catchments, and using a smaller subset of catchments could have led to very different conclusions. This highlights the importance of including multiple catchments in land-cover impact analysis at the mesoscale.

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“…In addition, the area occupied by impervious surfaces such as roads, trails, built-up areas and yards is also on the increase (Ziegler and Giambelluca, 1997;Rijsdijk et al, 2007;Sidle and Ziegler, 2012). This is often accompanied by strongly increased stormflow volumes during times of rainfall (Bruijnzeel and Bremmer, 1989;Fritsch, 1993;Chandler and Walter, 1998;Zhou et al, 2002;Ziegler et al, 2004;Ziegler et al, 2007) and shortages of water during extended dry periods (Bartarya, 1989;Madduma Bandara, 1997;Bruijnzeel, 2004;Tiwari et al, 2011). Such changes in streamflow regime effectively reflect the loss of the former forest sponge (cf.…”

Section: Introductionmentioning

confidence: 99%

Negative trade-off between changes in vegetation water use and infiltration recovery after reforesting degraded pasture land in the Nepalese Lesser Himalaya

Ghimire

Bruijnzeel

Lubczynski

et al. 2014

Hydrol. Earth Syst. Sci.

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Abstract. This work investigates the trade-off between increases in vegetation water use and rain water infiltration afforded by soil improvement after reforesting severely degraded grassland in the Lesser Himalaya of central Nepal. The hillslope hydrological functioning (surface and subsurface soil hydraulic conductivities and overland flow generation) and the evapotranspiration (rainfall interception and transpiration) of the following contrasting vegetation types were quantified and examined in detail: (i) a nearly undisturbed, natural broadleaved forest; (ii) a 25-year-old, intensively-used pine plantation; and (iii) a highly degraded pasture. Planting pines increased vegetation water use relative to the pasture and natural forest situation by 355 and 55 mm year −1 , respectively. On balance, the limited amount of extra infiltration afforded by the pine plantation relative to the pasture (only 90 mm year −1 due to continued soil degradation associated with regular harvesting of litter and understory vegetation in the plantation) proved insufficient to compensate the higher water use of the pines. As such, observed declines in dry season flows in the study area are thought to mainly reflect the higher water use of the pines although the effect could be moderated by better forest and soil management promoting infiltration. In contrast, a comparison of the water use of the natural forest and degraded pasture suggests that replacing the latter by (mature) broadleaved forest would (ultimately) have a near-neutral effect on dry season flows as the approximate gains in infiltration and evaporative losses were very similar (ca. 300 mm year −1 each). The results of the present study underscore the need for proper forest management for optimum hydrological functioning as well as the importance of protecting the remaining natural forests in the region.

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Runoff Responses Among Common Land Uses in the Uplands of Matalom, Leyte, Philippines

Cited by 50 publications

References 0 publications

Improving efficacy of landscape interventions in the (sub) humid Ethiopian highlands by improved understanding of runoff processes

Improving efficacy of landscape interventions in the (sub) humid Ethiopian highlands by improved understanding of runoff processes

The impact of forest regeneration on streamflow in 12 mesoscale humid tropical catchments

Negative trade-off between changes in vegetation water use and infiltration recovery after reforesting degraded pasture land in the Nepalese Lesser Himalaya

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