Assessing the Effects of Historical Land Cover Changes on Runoff and Low Flows Using Remote Sensing and Hydrological Modeling

Savary, Stéphane; Rousseau, Alain N.; Quilbé, Renaud

doi:10.1061/(asce)he.1943-5584.0000024

Cited by 37 publications

(24 citation statements)

References 25 publications

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“…A considerable reduction of both the peak runoff and the total runoff volumes resulted from intensified afforestation. Savary et al (2009) assessed the effects of historical LULC change on runoff and low flow using the Gestion Intégrée des Bassins versantsà l'aide d'un Système Informatisé (GIBSI) model in the Chaudiere River watershed, Canada. Simulations showed strong correlations between LULC changes and stream discharge at the outlet of the watershed, especially for the summer and fall seasons.…”

Section: Introductionmentioning

confidence: 99%

Modelling effects of land use/cover changes under limited data

Wang

Kalin

2010

Ecohydrology

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Watershed models are valuable tools used in the study of impacts of land use/cover (LULC) changes on hydrology. We use the Soil and Water Assessment Tool (SWAT) to study the impacts of LULC changes in a coastal Alabama watershed, where flow data did not exist at the onset of the study. We set up and calibrated the model in the neighbouring Magnolia River watershed. Relevant model parameters were then transferred to the Wolf Bay watershed. Impacts of LULC changes on hydrology are studied in the Wolf Bay watershed by running the model with the default parameters, transferred model parameters (from the Magnolia River watershed), and calibrated parameters at the Wolf Bay watershed with limited data that became available later during the study. The relative changes in flow duration curves (FDCs) due to differing LULC showed a similar pattern with each parameter set: There is a clear threshold of around 1% probability of exceedance where the relative change is at its maximum. The relative change in flow due to LULC change drops drastically with increasing probability of exceedance of beyond 2% until it reaches a plateau at p D 20%. Hence, small to medium range flows are less sensitive to the parameter set. Further, the impact of LULC change on flow gradually decreases with the size of the storm for very large events (probability of exceedance <1%).

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Section: Introductionmentioning

confidence: 99%

Modelling effects of land use/cover changes under limited data

Wang

Kalin

2010

Ecohydrology

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“…Indeed, the fact that observed discharge data for this river segment (1971–2000) are prior to the land cover map used in this study (Beaulieu et al ., ) can lead to a certain degree of deviation between observed and simulated data (e.g. Savary et al ., ). Thus, the closer in time the simulations are with respect to the land cover map used, the greater is the improvement.…”

Section: Resultsmentioning

confidence: 97%

Integrating isolated and riparian wetland modules in the PHYSITEL/HYDROTEL modelling platform: model performance and diagnosis

et al. 2015

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Abstract:Mathematical modelling is a well-accepted framework to evaluate the effects of wetlands on stream flow and watershed hydrology in general. Although the integration of wetland modules into a distributed hydrological model represents a costeffective way to make this assessment, the added value brought by landscape-specific modules to a model's ability to replicate basic hydrograph characteristics remains unclear. The objectives of this paper were the following: (i) to present the adaptation of PHYSITEL (a geographic information system) to parameterize isolated and riparian wetlands; (ii) to describe the integration of specific isolated wetland and riparian wetland modules into HYDROTEL, a distributed hydrological model; and (iii) to evaluate the performance of the updated modelling platform with respect to the capacity of replicating various hydrograph characteristics. To achieve this, two sets of simulations were performed (with and without wetland modules), and the added value was assessed at three river segments of the Becancour River watershed, Quebec, Canada, using six general goodness-of-fit indicators and 14 water flow criteria. A sensitivity analysis of the wetland module parameters was performed to characterize their impact on stream flows of the modelled watershed. Results of this study indicate the following: (i) integration of specific wetland modules can slightly increase the capacity of HYDROTEL to replicate basic hydrograph characteristics; and (ii) the updated modelling platform allows for the explicit assessment of the impact of wetlands (e.g. typology and location) on watershed hydrology.

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“…Normally, after vegetation is removed, the distribution of roots becomes shallower, the soil porosity (especially the non-capillary porosity) decreases and the soil moisture-holding capacity decreases. Legesse et al [11], Coe et al [12], Savary et al [13] and Schilling et al [14] have performed related studies regarding the changes in runoff under different land use conditions and have obtained similar results. These authors observed that ET is stronger from woodlands than from other types of land.…”

Section: Introductionmentioning

confidence: 79%

An Analysis of Land Use Change Dynamics and Its Impacts on Hydrological Processes in the Jialing River Basin

Zhang

Xia

et al. 2014

Water

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Land use changes are important aspects of global change and affect regional water cycles, environmental quality, biodiversity and terrestrial ecosystems. To understand the temporal and spatial land use change in the Jialing River Basin and its impacts on the hydrological cycle, land use change models and the variable infiltration capacity (VIC) model were applied separately to the Jialing River Basin. Real change and final change were analyzed to determine the consequences of land use changes and their hydrological consequences. Real change is defined as the total variation during a fixed period, including increases and decreases. Thus, real change is the sum of the absolute values of the decrease and the increase. Final change is defined as the difference between the beginning and end of a given period for a specific factor. Overall, the amounts of settlement and shrub land area changed significantly in the entire Jialing River (with final change rates of 20.77% and −16.07%, respectively, and real change rates of 34.2% and 30.1%, respectively, from 1985 to 1995, as well as final and real change rates of 29. 37%, 12.40%, 39.9% and 32.8%, respectively, from 1995 to 2000). Compared with the final change, the real change highlighted the rate of change and the change in woodland area. The land use changes in OPEN ACCESSWater 2014, 6 3759 the Lueyang (LY), Shehong (SH) and Fengtan (FT) subcatchments were more dynamic than in the other subcatchments. The economy, population and macro-policy were the main factors responsible for driving the land use changes. The decrease in woodland area in the LY subcatchment corresponded with an increase in evapotranspiration (ET) and with decreases in the other hydrological elements. Overall, the final changes in the hydrological elements in the LY, SH and FT subcatchments were not significant due to the average and compensation effects. The LY subcatchment was mainly affected by the average effect, whereas the SH and FT subcatchments were affected by the average and compensation effects. The use of real change can increase the detectability of hydrological elements changes caused by land use change in SH and FT. The results of this study provide new insights regarding the examination of the effects of land use changes on hydrological regimes. These results are useful for land use planners and water resource managers.

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Assessing the Effects of Historical Land Cover Changes on Runoff and Low Flows Using Remote Sensing and Hydrological Modeling

Cited by 37 publications

References 25 publications

Modelling effects of land use/cover changes under limited data

Modelling effects of land use/cover changes under limited data

Integrating isolated and riparian wetland modules in the PHYSITEL/HYDROTEL modelling platform: model performance and diagnosis

An Analysis of Land Use Change Dynamics and Its Impacts on Hydrological Processes in the Jialing River Basin

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