Flood Hazard Assessment and Delimitation of the Likely Flood Hazard Zones of the Upper Part in Gallikos River Basin

Tsitroulis, I.; Voudouris, Konstantinos; Vasileiou, Apostolos; Mattas, Christos; Sapountzis, Marios; Maris, Fotios

doi:10.12681/bgsg.11804

Cited by 4 publications

(3 citation statements)

References 9 publications

(9 reference statements)

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“…Excess recharge that cannot be accommodated by a karst aquifer due to insufficient aquifer storage or flow capacity can cause groundwater levels to rise and inundate basins as well as the surrounding areas [7,8]. This ephemeral flooding can pose significant risks to humans, farmland, and infrastructures [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Earth Observation Data Synergy for the Enhanced Monitoring of Ephemeral Water Bodies to Anticipate Karst-Related Flooding

2023

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With the increasing availability and diversity of satellite imagery, the multisensor fusion of data can more effectively address the improved monitoring of temporary water bodies. This study supports the attempt to apply well established methods to detect spatial and temporal changes in ephemeral shallow lakes in lowland karst terrain, as well as to improve the understanding concerning the dynamics of water storage and hydrological mechanisms during extreme precipitation events. Based on the joint analysis of Copernicus Sentinel SAR and optical mission data, as well as soil moisture and EO-based rainfall observations over the period of 2015–2020, we demonstrated the control of the karst system on the ephemeral lake appearances in the broader area of Chalkida (Evvia, Greece). A connection between the prolonged and extended water coverage in the ephemeral lakes and flooding in the area is documented. Our EO-supported findings may serve as indicators for flood alerts in future extreme precipitation events, improving responses in cases of emergencies.

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Section: Introductionmentioning

confidence: 99%

Earth Observation Data Synergy for the Enhanced Monitoring of Ephemeral Water Bodies to Anticipate Karst-Related Flooding

2023

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“…The main steps in flood risk management are the following [9]: flood planning mitigation measures (before flood), response measures (during flood) and recovery (after flood). Different methods and techniques have been applied, including simulation (e.g., HEC-RAS software package), index methods, statistical analysis and hybrid methods in a geographic information system (GIS) environment [10][11][12]. GIS is recognized as a powerful means to integrate and analyze data from different sources.…”

Section: Introductionmentioning

confidence: 99%

Assessing Flood Hazard at River Basin Scale with an Index-Based Approach: The Case of Mouriki, Greece

Patrikaki¹,

Kazakis

Kougias

et al. 2018

Geosciences

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Defining flood-prone areas is particularly important for policy makers, in order to design mitigation strategies and implement flood risk management planning. The present research applies a multicriteria index method to assess flood hazard areas at a river basin scale, in a geographic information system (GIS) environment. The developed methodology has been applied for an area in northeastern Greece, by processing information of seven parameters: flow accumulation, distance from the drainage network, elevation, land use, rainfall intensity and geology. The method assigns a relative importance to each of the parameters for the occurrence and magnitude of flooding, and the relevant weight values are defined through an "analytical hierarchy process". Subsequently, and according to the relative importance of each index, the spatial information is superimposed, resulting in a flood hazard map of the studied region, an area in northern Greece. The obtained results indicate flood-prone zones, with a very high flood hazard mainly occurring at the lowlands in the vicinity of the drainage network. The provided flood hazard map supports planning activities and mitigation plans that are crucial to protect both the agricultural activities and existing infrastructure from future flood events.

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“…Surface water abstractions for irrigation purposes take place by the construction of very small-scale dams or by direct abstractions. Extreme flooding events have been recorded over the last decades inundating large areas resulting in human losses, infrastructure, and agriculture damages [16]. The most recent events were recorded during the years 2004, 2014, and 2015.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Extreme Dry and Wet Conditions Using Climate and Hydrological Indices in the Upper Part of the Gallikos River Basin

Mattas

Αnagnostopoulou²,

Venetsanou

et al. 2018

Ecws-3

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Climate changes in the Mediterranean region, especially those related to changes in rainfall distribution and occurrence of extreme events, affect local economies. Agriculture is a sector strongly affected by climate conditions and concerns the majority of the Greek territory. The Gallikos river basin is an area of great interest regarding climate change impacts since it is an agricultural area depended on surface water resources and an area in which extreme events relatively often take place (e.g., floods). Long time series precipitation (27 years) and temperature data derived from measurement stations along with reanalysis data (ERA INTERIM) were used for the estimation of water availability and climate type over time in the area. The Standardized Precipitation Index and De Martonne aridity index was employed. The water flow measurements were correlated in order to investigate the interrelation between the different river branches and the extent of the meteorological changes effect in the basin. Descriptive statistics and cumulative curves were applied to check homogeneity of data. The results revealed that the climate type varies from semi arid to very wet, and water availability ranges from moderately dry to extremely wet years. Reanalysis data overestimate precipitation. The meteorological changes affect, at the same time, the entire basin since the flow rate peaks occur simultaneously in the hydrographic network at different areas.

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Flood Hazard Assessment and Delimitation of the Likely Flood Hazard Zones of the Upper Part in Gallikos River Basin

Abstract: Floods are one of the most common natural hazards in global range and could threat the human life, health, environment and infrastructure. The aim of this paper is the

Cited by 4 publications

References 9 publications

Earth Observation Data Synergy for the Enhanced Monitoring of Ephemeral Water Bodies to Anticipate Karst-Related Flooding

Earth Observation Data Synergy for the Enhanced Monitoring of Ephemeral Water Bodies to Anticipate Karst-Related Flooding

Assessing Flood Hazard at River Basin Scale with an Index-Based Approach: The Case of Mouriki, Greece

Evaluation of Extreme Dry and Wet Conditions Using Climate and Hydrological Indices in the Upper Part of the Gallikos River Basin

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