Effect of Forest Thinning on Water Yield in a Sub-Humid Mediterranean Oak-Beech Mixed Forested Watershed

Gökbulak, Ferhat; Şengönül, Kamil; Serengil, Yusuf; Özhan, Süleyman; Yurtseven, İbrahim; Uygur, Betül; Özçelik, Mehmet Said

doi:10.1007/s11269-016-1467-7

Cited by 17 publications

(9 citation statements)

References 28 publications

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“…Log transformation of the runoff data was deemed necessary after assessing the normality of the data and assessing the goodness of fit with a Shapiro–Wilk w test using PROC UNIVARIATE (Bowley, 2008). To determine the effect of a change in agricultural management (from a conventional wheat–fallow rotation to a no‐till wheat–fallow and subsequently wheat–lentil/pea rotation, and to an organic wheat–green manure rotation) on snowmelt water yield, we compared predicted runoff from the relationship established prior to the change in management with the observed runoff post‐change in management, in accordance with the methodology of Gökbulak et al (2016) and Yurtseven et al (2017). We established linear regression relationships for the log‐transformed runoff volume from snowmelt episodes for Plot 1 and 2 against the control Plot 3, prior to the change in management in 1993.…”

Section: Methodsmentioning

confidence: 99%

Nutrient Loss in Snowmelt Runoff: Results from a Long‐term Study in a Dryland Cropping System

et al. 2019

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Snowmelt runoff often comprises the majority of annual runoff in the Canadian Prairies and a significant proportion of total nutrient loss from agricultural land to surface water. Our objective was to determine the effect of agroecosystem management on snowmelt runoff and nutrient losses from a long-term field experiment at Swift Current, SK. Runoff quantity, nutrient concentrations, and loads were estimated after a change in management from conventionally tilled wheat (Triticum aestivum L.)-fallow (Conv W-F) to no-till wheat-fallow and subsequently no-till wheat-pulse (NT W-F/LP) and to an organic system with a wheat-green manure rotation (Org W-GM). The conversion from conventional tillage practices to no-till increased snowmelt runoff likely due to snow trapping by standing stubble after summer fallow. Relatedly, runoff after no-till summer fallow had higher dissolved P losses (0.07 kg P ha −1 ). Replacing summer fallow with a pulse crop in the no-till rotation decreased snowmelt runoff losses and nutrient concentrations. The Org W-GM treatment had the lowest P loss after stubble (0.02 kg P ha −1 ) but had high dissolved P concentrations in snowmelt following the green manure (0.55 mg P L −1 ), suggesting a contribution from incorporated crop residues. In this semiarid climate with little runoff, dissolved reactive P and NO 3 -N loads in snowmelt runoff were smaller than those reported elsewhere on the prairies (averaging <0.05 kg P ha −1 yr −1 , and <0.2 kg NO 3 -N ha −1 yr −1 ); however, the nutrient concentrations we observed, in particular for P, even without P fertilizer addition for organic production, question the practicality of agricultural management systems in this region meeting water quality guidelines.

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Section: Methodsmentioning

confidence: 99%

Nutrient Loss in Snowmelt Runoff: Results from a Long‐term Study in a Dryland Cropping System

et al. 2019

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“…The paired watershed approach is an acceptable methodology to test the effect of timber harvest on the water yield and streamflow chemistry while eliminating extraneous effects resulting from variabilities in the biotic and abiotic factors in the treatment sites. The paired watershed method works on two or more watersheds located adjacent to or near each other with similar characteristics in terms of size, slope, aspect, soil, topography, climate, and vegetation (land cover) (Clausen & Spooner, 1993; Gökbulak et al, 2016). The great advantage of the paired watershed approach is to measure the effects of forestry activities on watershed hydrology on small scales and interpolate its results to large scales.…”

Section: Introductionmentioning

confidence: 99%

Effect of timber removal on the total nutrient fluxes from a freshwater‐supplying forested watershed

Yurtseven

Gökbulak

Serengil

et al. 2022

Water Environment Research

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Effects of 18% thinning on nutrient fluxes were investigated in a broadleaf forest. Streamflow and suspended sediment were sampled during the calibration and treatment periods for the treatment and control watersheds to determine total nutrient fluxes through bedload sediment and runoff. Streamflow was measured, and water samples were collected from the streams of the watersheds. The volume of the bedload deposited in both weirs' pools was measured, and sediment deposits were sampled at the ends of the calibration and treatment periods. Water and sediment samples were analyzed for calcium (Ca2+), magnesium (Mg2+), Kjeldahl nitrogen (KN), sodium (Na+), potassium (K+), iron (Fe3+), and sulfur (S2−). Results showed that there was only a significant increase in KN loss from 0.01 kg/ha to 0.10 kg/ha and from 0.04 kg/ha to 2.41 kg/ha in the second and the third post‐treatment years, respectively (P < 0.05). Thinning was not intensive to change nutrient outflow in the study site. Practitioner Points The 18% thinning was not intensive enough to increase the total nutrient flux, deteriorate water chemical quality, and hence threaten aquatic life in the stream water. Significant increases were found only in KN outflow after timber removal. If there is no information about the effect of timber harvest on nutrient loss in a specific watershed, the application of evenly distributed low‐intensity timber harvest may be a good option to protect stream water quality in forested watersheds. Further investigations are needed about the effects of various timber harvest intensities on physical water quality (odor, color, turbidity, taste, temperature, etc.) and biological characteristics (population and biodiversity of aquatic organisms) of the stream water for making better water management plans.

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“…Several studies were conducted about forestry practices and their effect on watershed hydrology in the last couple of decades in the Belgrad Forest (Serengil et al 2007a, Serengil et al 2007b, Gokbulak et al 2016, Yurtseven et al 2017, Erdogan et al 2018, the response of soil moisture and soil temperature to vegetation change from forest to herbaceous vegetation (Ozkan & Gokbulak 2017), effects of forest canopy cover on water chemical quality (Eisalou et al 2013) and calculation of evapotranspiration with catchment water balance equation (Ozhan et al 2010). Ozhan (1982) reported that 28.3% of the precipitation returns to the atmosphere via interception in pine stands and 15.6% in oak stands in the Belgrad Forest.…”

Section: Introductionmentioning

confidence: 99%

Transpiration of Anatolian black pine and sessile oak forest stands in a sub-humid region of Turkey

Özçelik

Şengönül

2021

AFR

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Transpiration is a key component of the watershed water budget. Therefore, determining the transpiration of forest stands with different characteristics have been of interest for watershed hydrology and forest management practices in a wide range of environments. The objectives of this study were to compare transpiration of Anatolian black pine (Pinus nigra Arn. subsp. pallasiana (Lamb.) Holmboe) and sessile oak (Quercus petraea (Matt.) Liebl.) tree stands and to model transpiration based on the measured climatic factors. Stand transpirations were calculated from sap flow measurements made by the trunk heat balance method. We conducted an exploratory factor analysis (PCR) to detect affecting meteorological factors of stand transpiration, and we developed linear regression equations to predict transpiration of pine and oak stands. Mean daily and yearly canopy transpiration (Ec) were 1.05 mm day-1 and 378.3 mm year-1 for the pine stand and 3.52 mm day-1 and 801.7 mm year-1 for the oak stand. There was a highly positive correlation between daily stand transpiration and wind speed, global radiation, air vapour pressure deficit and air temperature, but a negative correlation with relative humidity for both stands. Soil water potential had little effect on stand transpiration. The model equations accounted for 81% of the variations in transpiration for the pine stand and 85% for the oak stand. Therefore, the transpiration of forest stands should be considered for effective vegetation management practices, as model equations to estimate the transpiration of pine and oak stands in the region.

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Effect of Forest Thinning on Water Yield in a Sub-Humid Mediterranean Oak-Beech Mixed Forested Watershed

Cited by 17 publications

References 28 publications

Nutrient Loss in Snowmelt Runoff: Results from a Long‐term Study in a Dryland Cropping System

Nutrient Loss in Snowmelt Runoff: Results from a Long‐term Study in a Dryland Cropping System

Effect of timber removal on the total nutrient fluxes from a freshwater‐supplying forested watershed

Transpiration of Anatolian black pine and sessile oak forest stands in a sub-humid region of Turkey

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