Effects of Selective Logging Methods on Runoff Characteristics in Paired Small Headwater Catchment

Suryatmojo, Hatma; Fujimoto, Motoaki; Kosugi, Ken’ichiro; Mizuyama, Takahisa

doi:10.1016/j.proenv.2013.02.032

Cited by 11 publications

(7 citation statements)

References 7 publications

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“…In the forest catchment, the hydrograph shows a delayed response suggesting that subsurface flow and subsequent overland flow on saturated areas were important processes. As explained by Suryatmojo et al (2013), physical catchment parameters such as slope, shape, main-stream slope and drainage density affect stream flow and influence the shape of the hydrograph through catchment storage, runoff speed, infiltration and soil water content. Although the study catchments display similar patterns, when the flows begin to decline with the onset of the dry season, the flow of forest catchment decreases first.…”

Section: Soil Moisture Variationmentioning

confidence: 99%

Characterizing rainfall-runoff signatures from micro-catchments with contrasting land cover characteristics in southern Amazonia

et al. 2014

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Abstract:On the basis of interactions between landscape characteristics and precipitation inputs, watersheds respond differently to different climatic inputs. The objective of this study was to quantitatively characterize controls on runoff generation from two first order micro-catchments in the Amazonia region. The study investigated the variation of hydrological signatures at micro-catchment scale and related these to landscape and land cover differences and weather descriptors that control the observed responses. One catchment is a pasture cleared of all natural vegetation in the early 1980s, and the second catchment is a primary tropical forest with minor signs of disturbance. Water levels and meteorological variables were continuously monitored during the study period (December 2012-May 2013. Water level measurements were converted to discharge, evapotranspiration was quantified using Penman-Monteith equation and catchment pedohydrological properties were also determined. During the study period, mean total rainfall was 1200 mm, and direct runoff ratios were 0.29 and 0.12 for the pasture and forest catchments, respectively. Base flow index was relatively high in the forest catchment (0.76) compared with pasture catchment (0.63). Results from this study showed that the pasture catchment had a 35% higher mean stream flow. Analysis of selected individual rainstorm events also showed peak discharges, which were attained much faster in the pasture catchment compared with the forest catchment. At both sites, rainfall-runoff responses were highly dependent on surface and subsurface flow generation. Overland flow was observed in the pasture site during intense rainfall events. The pasture catchment exhibited higher event water contribution than the forest catchment. Findings from this research suggest that shallow lateral pathways play a significant role in controlling runoff generation processes in the forest catchment, whereas infiltration excess runoff generation processes dominate in the pasture catchment. The findings in this study suggest that the conversion of forest to pasture may lead to important changes in runoff generation processes and water storage in these head water catchments.

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Section: Soil Moisture Variationmentioning

confidence: 99%

Characterizing rainfall-runoff signatures from micro-catchments with contrasting land cover characteristics in southern Amazonia

et al. 2014

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“…This indicates that forest interception (include canopy interception and forest floor interception) in the VF site contributed to reducing the peak discharge (Qp) in Figure 12. In the VF site, the average canopy interception was 23.8% of rainfall and the average forest interception was 91.7% [46].…”

Section: Effectiveness Of a River Buffer On Surface Runoff Flowmentioning

confidence: 96%

River Buffer Effectiveness in Controlling Surface Runoff Based on Saturated Soil Hydraulic Conductivity

Suryatmojo

Kosugi

2021

Water

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In tropical Indonesia, rainforests are managed by an intensive forest management system (IFMS). The IFMS has promoted selective logging for timber harvesting and intensive line planting to enrich the standing stock. The implementation of the IFMS has reduced the forest canopy cover, disturbed the surface soil, changed the soil hydraulic properties, and increased direct runoff and soil erosion. Investigation of the IFMS impact on soil hydraulic properties and the generation of surface runoff using a saturated hydraulic conductivity model is needed. Soil hydraulic properties were investigated on 11 plots, including one virgin forest plot and 10 plots at different operational periods of the IFMS. A two-dimensional saturated soil water flow simulation was applied to generate surface runoff from different periods of the IFMS. The main parameters of canopy cover, net rainfall, and saturated hydraulic conductivity were used in the simulations. A simulation scenario of a surface runoff hydrograph in different forest operations was used to analyze the river buffer effectiveness. The results showed that fundamental IFMS activities associated with mechanized selective logging and intensive line planting have reduced the soil hydraulic conductivity within the near-surface profile. The recovery time for near-surface Ks on non-skidder tracks was between 10 and 15 years, whereas on the skidder tracks it was more than 20 years. Forest disturbances have altered the typical surface hydrological pathways, thereby creating the conditions for more surface runoff on disturbed surfaces than on undisturbed surfaces. Maintaining the buffer area is an effective means to reduce the peak discharge and surface runoff in the stream channel.

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“…Di antara hasil-hasil penelitian tersebut adalah dampak pembukaan hutan dalam meningkatkan hasil air untuk kurun waktu tertentu (Pudjiharta, 2008;Nobrega et al, 2010;Zegree, 2011;Khanal & Parajuli, 2013), meningkatkan erosi dan sedimentasi di badan air (Hidayat et al, 2008;Khanal & Parajuli, 2013), menurunkan kualitas air sungai (Palmer, 2011;Kastendick et al, 2012;Kebede et al, 2014), serta memengaruhi karakteristik hidrograf aliran (Wenjie et al, 2011;Kuras et al, 2012;Suryatmojo et al, 2013).…”

Section: Pendahuluanunclassified

Changes in the characteristics of after logging streamflow hydrograph of Eucalyptus pellita F. Muell stands

Supangat¹

2017

JPKW

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Pembangunan skala luas hutan tanaman Eucalyptus pellita F. Muell di Provinsi Riau dengan menerapkan sistem silvikultur tebang habis pada jenis tanaman cepat tumbuh, disinyalir berdampak pada berubahnya fungsi hidrologi Daerah Aliran Sungai (DAS). Tujuan penelitian ini adalah untuk mengetahui perubahan karakteristik hidrograf aliran sungai setelah penebangan tanaman E. pellita. Penelitian dilaksanakan di kawasan hutan tanaman E. pellita pada satuan pengamatan DAS Mikro seluas 4,62 ha di Perawang, Provinsi Riau. Teknik yang digunakan adalah analisis hidrograf satuan terhadap data terpilih hidrograf banjir. Hasil penelitian menyimpulkan bahwa penebangan dengan sistem tebang habis menyebabkan peningkatan debit puncak banjir dari rata-rata 0,226 m 3 /dt menjadi 0,322 m 3 /dt, memperpendek waktu dasar pada hidrograf aliran dari rata-rata 143 menit menjadi 90 menit, mempercepat waktu mencapai puncak banjir dari rata-rata 80 menit menjadi 40 menit, serta menurunkan aliran dasar rata-rata dari 0,0056 m 3 /dt menjadi 0,0032 m 3 /dt.

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Effects of Selective Logging Methods on Runoff Characteristics in Paired Small Headwater Catchment

Cited by 11 publications

References 7 publications

Characterizing rainfall-runoff signatures from micro-catchments with contrasting land cover characteristics in southern Amazonia

Characterizing rainfall-runoff signatures from micro-catchments with contrasting land cover characteristics in southern Amazonia

River Buffer Effectiveness in Controlling Surface Runoff Based on Saturated Soil Hydraulic Conductivity

Changes in the characteristics of after logging streamflow hydrograph of Eucalyptus pellita F. Muell stands

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