Modelling and Evaluation of the Effect of Afforestation on the Runoff Generation Within the Glinščica River Catchment (Central Slovenia)

Abstract

Introduction 2 The Glinščica River Catchment 3 Model Simulations 4 Cost-Benefit Analysis 4.1 Cost of Afforestation 4.2 Benefits of Flood Protection Measures 4.3 Biodiversity 4.4 Carbon 4.5 Recreation 4.6 Water Quality 5 Results and Discussion 6 Conclusion References

Exploring Options for Flood Risk Management with Special Focus on Retention Reservoirs

“…The catchment area before the confluence with the larger Gradaščica river is 16.9 km 2 (Figure 1). This case study is one of the experimental catchments in Slovenia [21,[31][32][33] and was selected since it was already used in previous applications and since it is a hydrological, a hydraulic and a flood damage model for this catchment are already set-up, calibrated, and evaluated using the data obtained at the scope of the measurements within the experimental catchments. The eastern and western parts of the catchment are hillier and mainly forested while central and southern parts are flatter and more intensively urbanized (Figure 1).…”

“…According to the Soil Conservation Service (SCS) methodology, the soil characteristics can be classified into C and D types with generally low infiltration rates [31]. A detailed description of the catchment can be found in previous studies [21,31,32].…”

“…Similarly as Johnen et al [21] this study used the hydrological HEC-HMS, the hydraulic model HEC-RAS, and the flood damage KRPAN model. The HEC-HMS model is one of the most frequently used rainfall-runoff models that includes simulation of the most relevant hydrological processes [34].…”

“…However, it is not always clear if a specific green or blue measure is able to provide sufficient flood risk reduction given the variety of hydrological conditions [20]. Therefore, additional research, directed into site specific conditions, is needed in order to better evaluate the impact of different measures on the hydrological conditions within the catchment and consequently on flood risks [17,21]. A second need stems from the fact that limited social acceptance of purely green measures often encounter resistance in planning departments due to institutional path dependency related to the history of utilizing grey measures.…”

“…Modelling approaches and case studies investigations can help in creating a scientific basis to support implementation of specific flood risk measure and speed up implementation procedure by environmental engineers and spatial planners. Most of the studies that have been conducted so far took into consideration one specific flood risk management option and a comparison of different measures is not carried out [21,[25][26][27][28]. Only limited number of studies took into consideration multiple flood risk reduction measures [29].…”