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An Improved SCS-CN Method Incorporating Slope, Soil Moisture, and Storm Duration Factors for Runoff Prediction
Article

Using SCS-CN and Earth Observation for the Comparative Assessment of the Hydrological Effect of Gradual and Abrupt Spatiotemporal Land Cover Changes

1
Department of Natural Resources Management and Agricultural Engineering, Agricultural University of Athens, 75 Iera Odos st., 11855 Athens, Greece
2
Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Praha, Czech Republic
*
Author to whom correspondence should be addressed.
Water 2020, 12(5), 1386; https://doi.org/10.3390/w12051386
Received: 21 April 2020 / Revised: 7 May 2020 / Accepted: 9 May 2020 / Published: 13 May 2020
In this study a comparative assessment of the impacts of urbanization and of forest fires as well as their combined effect on runoff response is investigated using earth observation and the Soil Conservation Service Curve Number (SCS-CN) direct runoff estimation method in a Mediterranean peri-urban watershed in Attica, Greece. The study area underwent a significant population increase and a rapid increase of urban land uses, especially from the 1980s to the early 2000s. The urbanization process in the studied watershed caused a considerable increase of direct runoff response. A key observation of this study is that the impact of forest fires is much more prominent in rural watersheds than in urbanized watersheds. However, the increments of runoff response are important during the postfire conditions in all cases. Generally, runoff increments due to urbanization seem to be higher than runoff increments due to forest fires affecting the associated hydrological risks. It should also be considered that the effect of urbanization is lasting, and therefore, the possibility of an intense storm to take place is higher than in the case of forest fires that have an abrupt but temporal impact on runoff response. It should be noted though that the combined effect of urbanization and forest fires results in even higher runoff responses. The SCS-CN method, proved to be a valuable tool in this study, allowing the determination of the direct runoff response for each soil, land cover and land management complex in a simple but efficient way. The analysis of the evolution of the urbanization process and the runoff response in the studied watershed may provide a better insight for the design and implementation of flood risk management plans. View Full-Text
Keywords: runoff; SCS-CN; NRCS-CN; earth observation; LUCC; wildfire; urbanization runoff; SCS-CN; NRCS-CN; earth observation; LUCC; wildfire; urbanization
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MDPI and ACS Style

Psomiadis, E.; Soulis, K.X.; Efthimiou, N. Using SCS-CN and Earth Observation for the Comparative Assessment of the Hydrological Effect of Gradual and Abrupt Spatiotemporal Land Cover Changes. Water 2020, 12, 1386. https://doi.org/10.3390/w12051386

AMA Style

Psomiadis E, Soulis KX, Efthimiou N. Using SCS-CN and Earth Observation for the Comparative Assessment of the Hydrological Effect of Gradual and Abrupt Spatiotemporal Land Cover Changes. Water. 2020; 12(5):1386. https://doi.org/10.3390/w12051386

Chicago/Turabian Style

Psomiadis, Emmanouil, Konstantinos X. Soulis, and Nikolaos Efthimiou. 2020. "Using SCS-CN and Earth Observation for the Comparative Assessment of the Hydrological Effect of Gradual and Abrupt Spatiotemporal Land Cover Changes" Water 12, no. 5: 1386. https://doi.org/10.3390/w12051386

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