4 results on '"Mirabela Marin"'
Search Results
2. Climate services for sustainable resource management: The water—energy—land nexus in the Tărlung river basin (Romania)
- Author
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Nicu Constantin Tudose, Sorin Cheval, Cezar Ungurean, Annelies Broekman, Anabel Sanchez-Plaza, Roger Cremades, Hermine Mitter, Bernadette Kropf, Serban Octavian Davidescu, Lucian Dinca, Horia Cacovean, Mirabela Marin, Katarzyna Miksa, and Paulo Pereira
- Subjects
Urban Economics ,Climate services ,Drought ,Geography, Planning and Development ,Climate change ,SWAT ,Forestry ,Management, Monitoring, Policy and Law ,Nexus ,Nature and Landscape Conservation - Abstract
Decision-makers need tailored information regarding future climate, land use, forest management and societal scenarios for sustainable watershed management. Such information can be attained by integrating the water-energy-land nexus approach with climate services. To support decision-makers from Brașov metropolitan area (Romania), we co-developed land use, forest management and societal scenarios and analysed their impact on the water-energy-land nexus under climate change. We applied the Soil and Water Assessment Tool (SWAT) to the Săcele reservoir from the Tărlung river basin in order to spot the interrelations between nexus components under different climate and societal scenarios. In particular, we applied four bias-corrected GCM & RCM model combinations for two climate scenarios RCP4.5 and RCP8.5, nine land use and forest management scenarios, and twelve societal scenarios. Modelling results were analysed between 2020 and 2099. The results for the study area indicate that the projected average annual precipitation is close to historical averages in most climate scenarios explored, while the projected average annual temperature is increasing. Furthermore, the analysed data suggest an increase in severe dry intervals from approximately 6% (for the period 1961–2013) to 12% by the end of the 21st century, indicating that precipitation variability may change considerably. The SWAT model results show no significant changes in the water flow under different forest management scenarios. In contrast, model results for scenarios that imply forests' clearcutting and their replacement with pastures or meadows indicate that water quality is affected by increased sediment flow. Regarding the number of months with water scarcity in the Săcele reservoir (i.e. water demand exceeds water supply), we found an increase from 0.4 months in 2020 to 1.5 months in 2099. The model results also revealed that climate change significantly influences the water supply in the reservoir. To conclude, the regional stakeholders highly value the model results for the co-developed scenarios, which have been already used to promote sustainable resource management.
- Published
- 2022
3. Assessing the vulnerability of water resources in the context of climate changes in a small forested watershed using SWAT: A review
- Author
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Șerban Davidescu, Lucian Dinca, Andrei Adorjani, Mirabela Marin, Nicu Constantin Tudose, Horea Cacovean, I. Clinciu, Adriana Agafia Davidescu, Cezar Ungurean, and Alin Lucian Mihalache
- Subjects
Watershed ,Soil and Water Assessment Tool ,Watershed area ,Climate Change ,Context (language use) ,Forests ,010501 environmental sciences ,01 natural sciences ,Biochemistry ,Soil ,03 medical and health sciences ,0302 clinical medicine ,Streamflow ,030212 general & internal medicine ,SWAT model ,0105 earth and related environmental sciences ,General Environmental Science ,Hydrology ,Water ,Models, Theoretical ,15. Life on land ,6. Clean water ,Water resources ,13. Climate action ,Water Resources ,Environmental science ,Surface runoff - Abstract
The present study evaluates the applicability performance of the Soil and Water Assessment Tool (SWAT) in small forested watersheds (less than 1000 km2). This open-source software is widely used in investigations focused on water availability and quality. Overall, SWAT model performance ranges between satisfactory to good. Normally, underestimates daily peak discharges. The limitations of the model are related to the accuracy of climate data used and to the time period used for validation. Watershed area, forest cover and streamflow spatial distribution have an important influence on modeling processes. Overall, from the analyzed studies, we observed for discharge a decreasing tendency, more pronounced towards the end of the 21st century (up to −54%). For surface runoff, was noticed the same decreasing tendency up to 41%. Regarding sediment yield, the results vary within very wide limits. These findings vary according to watershed location, scenarios adopted, and the eligible period of time.
- Published
- 2020
4. Torrential flood risk assessment and environmentally friendly solutions for small catchments located in the Romania Natura 2000 sites Ciucas, Postavaru and Piatra Mare
- Author
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I. Clinciu, Adriana Agafia Davidescu, Mirabela Marin, Cezar Ungurean, Mihai Daniel Nita, Nicu Constantin Tudose, Andrei Adorjani, and Șerban Davidescu
- Subjects
Return period ,geography ,Environmental Engineering ,geography.geographical_feature_category ,Watershed ,010504 meteorology & atmospheric sciences ,Floodplain ,Flood myth ,Endangered species ,Drainage basin ,010501 environmental sciences ,01 natural sciences ,Pollution ,Flood risk assessment ,Environmental Chemistry ,Environmental science ,Natura 2000 ,Water resource management ,Waste Management and Disposal ,0105 earth and related environmental sciences - Abstract
The management of torrential flood risk areas located in natural protected sites requires special approaches. Also, those processes can cause casualties and damage socioeconomic structures (roads, railways, houses, etc.) The processes intercept protected landscapes, sometimes endangering protected species and habitats. The restoration of the streambed's stability in protected areas and the protection of the economic objectives affected by the torrential floods, imply special measures of planning. The planning measures are based on the use of ecological materials and technologies with minimal impact on the environment. The article presents a methodology for identifying small river basins with high torrential risk and the endangered economic objectives, as well as applying this methodology into three Natura 2000 sites from central Romania (ROSCI0207 Postavaru, ROSCI0195 Piatra Mare and ROSCI 0038 Ciucas). Identification of the basins was made considering their geomorphological and hydrological characteristics and the vulnerability of the intercepted socio-economic objectives. Into identified watershed, measurements of the streambed topography and the geometric characteristics of the endangered structures were made. Based on hydraulic simulations, maps were generated for floods with a 100-year return period. Using these flood maps, the maximum water level was determined to highlight the flood risk areas for each socioeconomics structural objective. In areas identified as floodplain, special structural and nonstructural solutions are proposed for guiding water into convenient paths to avoid the endangered structures.
- Published
- 2020
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