Hydrogeological conditions of the upper part of Gallikos river basin

Mattas, Christos; Σουλιοσ, Γ.

doi:10.1007/978-3-642-19902-8_39

Cited by 4 publications

(4 citation statements)

References 1 publication

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“…In the Aliakmonas river basin, approximately 294 × 10 6 m 3 of the available water volume is diverted annually to the irrigation networks of the plain, while 64 × 10 6 m 3 is used for the water supply of the city of Thessaloniki (population > 1 M). According to the hydrological balance of the Gallikos River, evapotranspiration, infiltration and superficial runoff stand at 85.1%, 4.5% and 10.4%, respectively, indicating the routine drying up of the river during summer (Mattas and Soulios, ).…”

Section: Methodsmentioning

confidence: 99%

Investigation of the temporal relation of remotely sensed coastal water quality with GIS modelled upstream soil erosion

et al. 2014

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Hydrological processes at the river basin influence the quality of downstream water bodies by controlling the loads of nutrients and suspended solids. Although their monitoring is important for social, economic and environmental reasons, in-situ measurements are too expensive and thus too sparse to describe their relations. The aim of this study is to investigate the temporal relations of soil erosion in the upstream part of river basins with water quality characteristics in the downstream coastal zone, using satellite remote sensing and GIS modelling. Data from satellite missions of MODIS, SRTM and TRMM were used to describe the soil erosion factors of the Universal Soil Loss Equation in three river basins, and MERIS satellite data was used to estimate chlorophyll-a and total suspended matter concentrations in the coastal zone of northwest Aegean Sea in Greece, where the rivers discharge. The resulting time series showed an average correlation of upstream rainfall with downstream water quality, which increased when soil erosion was introduced. Higher correlations were observed with the use of a time lag, revealing a variable delay between the three test sites. Lower correlation coefficients were observed for chlorophyll-a, due to the sensitivity of algae to environmental conditions. The use of free of charge satellite data and easy to operate GIS models renders the findings of this work useful for coastal zone management bodies, in order to help increase aquaculture productivity, predict algal blooms and predict siltation of ports.

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Section: Methodsmentioning

confidence: 99%

Investigation of the temporal relation of remotely sensed coastal water quality with GIS modelled upstream soil erosion

et al. 2014

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“…High values of nitrate were recorded at site 1 with concentration exceed the maximum allowable limit (50 mg/L NO 3 − ) for drinking water. These values are attributed to agriculture activities and livestock wastewater (Mattas, 2009). For All sites, pH and nitrates have negative indirect correlation (r = -0.68, p < .05); in keeping with Kim, Rajmohan, Kim, Hwang, and Cho (2004), the supply of nitrates therein case is ammonium oxidation or aerobic decomposition of organic matter.…”

Section: Groundwater Chemistrymentioning

confidence: 99%

Quality and hydrogeochemistry appraisal for groundwater in Tenth of Ramadan Area, Egypt

Ibrahim

Nofal

2020

Water Science

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Groundwater at Tenth of Ramadan area, Egypt, is the main source of water supply and it is ranked as high pollution risk area due to the high infiltration rate of the existing unlined oxidation ponds and the wastewater based-irrigation in the reclaimed desert. This investigation aims to evaluate groundwater quality and the spatial distribution of their ions, determine the chemical species (forms) of contaminated ions, and examine the process of water-rock interactions represented by the hydrogeochemical processes (ion exchange, dissolution, and precipitation) at Tenth of Ramadan area, Egypt. Eighteen water quality parameters were determined in triplicate samples collected from twelve wells in July 2017. Visual MINTEQ model was applied for geochemical speciation of cations, anions, trace and heavy elements in groundwater samples. The hydrogeochemical indices were used for investigating the quantity of changes in the chemical composition of groundwater. Outcomes revealed that the trend of spatial pollution for eleven water quality parameters is Site 3> Site 1> Site 2. The geochemical speciation indicated that Ca 2+ , K + , Mg 2+ , Na + , Cl − , SO 4 2-, NO 3 − , F − , HCO 3 −, and Fe 2+ are distributed as free ions. Hydroxides of Al 3+ , Fe 3+ and carbonate of Pb 2+ are predominant. The free ions of cadmium are accessible within the absence of dissolved organic carbon (DOC). The results suggest that evaporation, dissolution, and precipitation play an essential control on the groundwater composition within the aquifer. The reverse ion exchange process is more effective than the ion exchange process in controlling the water composition for 58% of samples. Hence, groundwater requires more advanced treatment. ARTICLE HISTORY

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“…Data from rain gauges and temperature measurement stations that were operating in the area for the same time period under the supervision of the competent authorities were also evaluated. During the years 2004 to 2006, the river water flow rate was measured at different major branches of the hydrographic network (see Figure 1) at specific time intervals and after rainfall events [19]. Descriptive statistics were applied on data.…”

Section: Data Collection and Analysismentioning

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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Hydrogeological conditions of the upper part of Gallikos river basin

Cited by 4 publications

References 1 publication

Investigation of the temporal relation of remotely sensed coastal water quality with GIS modelled upstream soil erosion

Investigation of the temporal relation of remotely sensed coastal water quality with GIS modelled upstream soil erosion

Quality and hydrogeochemistry appraisal for groundwater in Tenth of Ramadan Area, Egypt

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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