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projects:samos:reporting:texte

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Ableitung hydrographischer Daten aus einem Höhenmodell

Methodology for developing a model of the geo-hydrological system of the Imbrasos Basin (to Heraion of Samos):

I. Data Processing:

  • Generating a Digital Elevation Model.
  • Delineation of the catchment area surrounding and in connection to the Heraion of Samos.
  • Generating the drainage network of the catchment area including surface water levels and discharge data.
  • Generating of sub-catchment areas according to special geomorphic characteristics and special land-use characteristics.
  • Identifying the geological composition of the wider area under examination.
  • Examining the groundwater aquifer systems underlying the catchment area and beyond it’s borders.
  1. Topographic, Lithologic, and Land-use characteristics (Source: Gournelos et al., 2014)
BasinArea (km^2)Slope %Mean Elevation (m)Quaternary %Marls %Marly Limestone %Volcanics %Limestones Marbles %Schists Eruptive %Dominant Vegetation
Imbrasos basin51.9914.68333.3624.10211.881421.10480.195124.735327.9813Forrest - Fruit Trees

Aerial Image of Imbrasos basin (Source: Google Earth)

Program of hydrological investigation for Feb-Mar 2017 at Samos

Since there is no data of discharge for Imbrassos river we should produce our own data.

I. Imbrassos basin will be devided in sub-basins in order to investigate the influence that sub-basins have upon main basin of Imbrassos. We expect to locate sources within the relevant sub-basins.

II. Divers will be installed withing the river as well as at positions that we will locate withing the sub-basins of our system.

III. Four combinations of soil and vegetation will be considered:

  1. Marble - Forest
  2. Schist - Forest
  3. Marble - Maquis (Macchia) shrub-land
  4. Schist - Maquis (Macchia) shrub-land

For these 4 standardized cases we will install a metallic plate with a V - cut, along with a pressure sensor.

IV. In order to measure the velocity of water we can use of deuterium, since the area of Imbrassos mouth is a protected wetlands, under the presidential decree Π.Δ. (ΦΕΚ 229/ΑΑΠ/2012).

V. For the first reconnaissance of soil we will make trial hole (Βodenschürfe) and take some probes along.

VI. A soil map that will correlate to the relevant geological map will be also prepared.

VII. Land use will be identified/ standardized in correlation with the 4 standards set at point c. On the basis of spectral reflectance/remote sensing and satellite images of the area we can create the relevant maps once we have identified X locations that have certain features and by taking coordinates and photos of these areas. We can then assign the same characteristics to the areas that we will identify on the satellite images bearing the same features.

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