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projects:samos:reporting:texte [2017/02/03 10:19] annaprojects:samos:reporting:texte [2024/04/10 10:03] (aktuell) – Externe Bearbeitung 127.0.0.1
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 ====== Ableitung hydrographischer Daten aus einem Höhenmodell ====== ====== Ableitung hydrographischer Daten aus einem Höhenmodell ======
  
-Methodology for developing a model of the geo-hydrological system of the Imbrasos Basin (to Heraion of Samos): +Die Methodik zur Ableitung hydrographischer Daten aus dem Höhenmodell und Notizen zum Projekt in englischer Sprache befinden sich auf der [[en:projects:samos:reporting:texte|englisch-sprachigen Seite]].
- +
-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. +
- +
- +
-  - Topographic, Lithologic, and Land-use characteristics (Source: Gournelos et al., 2014) +
-<csv> +
-Basin, Area (km^2), Slope %, Mean Elevation (m), Quaternary %, Marls %, Marly Limestone %, Volcanics %, Limestones Marbles %, Schists Eruptive %, Dominant Vegetation  +
-Imbrasos basin, 51.99, 14.68, 333.36, 24.1021, 1.8814, 21.1048, 0.1951, 24.7353, 27.9813, Forrest - Fruit Trees +
-</csv> +
- +
-{{:projects:samos:samos.png|}} +
- +
-Aerial Image of Imbrasos basin (Source: Google Earth) +
- +
-{{:projects:samos:reporting:aerial_image_imbrasos_basin.png|}} +
- +
- +
-====== 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: +
- +
-  - Marble - Forest +
-  - Schist - Forest +
-  - Marble - Maquis (Macchia) shrub-land +
-  - 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. +
- +
-{{ :projects:samos:reporting:notes_on_the_hydrological_investigation_program_01.02.2017_.png?400 |}} +
- +
-====== Hypothesis on cult in regard to existence & extinction of springs at Heraion ====== +
- +
-The location of Heraion had a great abundance of natural springs that have been a point of identification for the site. At some points there has been a drought (more than one drought episodes) that led to the distinction of the springs, since water course changed decisively. However, due to micro-movements of the soil during the centuries some springs re-appeared at the site, a fact that led to the creation of a cult-tradition in this respect. +
- +
-====== Concept of the groundwater model at Imbrassos Basin (will be updated) ====== +
- +
-Step 0: +
-Study all relevant literature sources and data acquired from the Greek authorities in order to assign correct attributes to all soil types. (topography, Permeability (Kf values), porosity, height etc.). All steps that follow will be re-evaluated on this basis. +
- +
-Step 1: +
-Define the type of soil layers. The hypothesis is that initially there have been 4 layers,  +
-  * (A) marl  +
-  * (B) marble  +
-  * (C) schist  +
-  * (D) dolomite? +
- +
-The upper layer (A) was corroded while there has been a subsidence of 0.2 m. We would nowadays expect that the overlay of the initial layers is as following:  +
-  *  (I) alluvium (holocene)  +
-  *  (II) marl +
-  *  (III) marble +
-  *  (IV) schist  +
- +
-with an initial estimation of depths as presented below: +
-  * (I): D=12m +
-  * (II): D=50-100M +
-  * (III): D=50m? +
-  * (IV): D=? +
- +
-This layout offeres a constant change from soil the allows the water filtration (I and III) and other that don't (IV, partially II). We would expect that water makes its way between layers III and IV, since schist wouldn't allow filtration. +
- +
-Step 2: +
-3-d geometry of these layers, definition of limits, sealevel and rain+
  
-Step 3: +Konsolidierte Texte können in die Struktur für den [[:en:projects:samos:reporting:start|Jahresbericht der DFG in Englischer Sprache]]. 
-Run model, calibrate, check results+
/usr/www/users/uhydro/doku/data/attic/projects/samos/reporting/texte.1486113554.txt.gz · Zuletzt geändert: 2024/04/10 10:18 (Externe Bearbeitung)