open workshop 1st freewat user and developers international … · 2017-12-26 · ada pandele,...

Open Workshop

1st FREEWAT User and Developers International

WorkshopSeptember 21st 2017

IDAEA. CID - CSIC

16 Jordi Girona. 08034 Barcelona

Taken from: http://travessa-pirineus.blogspot.com.es/2014/08/dia-15-de-lospitalet-al-refugi-de-juclar.html

BANAT PLAIN – THE ROMANIAN CASE STUDY

FREEWAT PLATFORM APPLICATION

National Institute of Hydrology and

Water Management,

Ada Pandele, Marian Minciuna, Emil Radu,Irina Serpescu, Valentina Manea, Teodora Ionel,

Teodora Vasile, Catalina Radu

General presentation of Banat Plain (study area)

• Banat Plain is a recent subsidence alluvial plain;• The modeled domain is located in the central area of the

ROBA03 groundwater body and on small areas of theROBA04, ROBA02, ROBA01 groundwater bodies;

• The study objective was the shallow aquifer located inthe flood plain and terrace consisting of alluvial deposits(Upper Pleistocene – Holocene).

• The information, about the aquifer, comes from theobservation wells pertaining to the NationalHydrogeological Network;

• The bottom of the aquifer is around 15 m in the floodplain and terrace areas and around 30 m in interfluvesareas.

• The deposits consist of argillaceous +/- silty sands, sandswith gravels that alternate with sandy +/- silty clays,argillaceous +/- sandy silts;

• The aquifer is unconfined, but locally may present thebehavior of a confined aquifer, more exactly in the areaswhere, in the top of the porous permeable deposits, thereare argillaceous levels;

• The average multiannual hydrostatic level is at depths of1 – 5 m in the flood plain and terrace areas and 2 – 7 m ininterfluves areas.

Figure 1 - Study area location

General presentation of Banat Plain (study area)

Figure 6. Hydrogeological Cross-Section in na

Urseni Area

Figure 4. Hydrogeological Cross-Section in

Remetea Mare Area


Sanandrei Area


Jebel Area

Description of the first mathematical model created for the shallow aquifer in the study area

Figure 6 – The piezometric map

• The unconfined aquifer (ROBA03) is collectedin Quaternary deposits, consisting of sandyclay and loess, having in the bottom a claylayer;

• The mathematical model is run in a steady-state regimen. The saturated zonethicknesses varies between 7 and 37 m andthe hydraulic conductivity values rangebetween 10 and 30 m/day.

• The case study was developed within the EU project - SEE/A/022/2.1/X - CC WATERS -Climate Change and Impacts on Water Supply.

• The objective of the project was to estimate the influence of climate changes on theshallow groundwater resources;

• The mathematical model of the groundwater flow for the phreatic aquifer (ROBA03)in Banat Plain area (between the Old Bega River, in the north, and Timis River, in thesourth) was performed using the Groundwater Modeling System software by finite-difference method;

Description of the first mathematical model created for the shallow aquifer in the study area

Available data – INPUT DATA

• the hydrogeological parameters of the aquifer (hydraulic conductivity, lithological data,

abstraction yields values from phreatic aquifer, transmissivity, porosity) rivers water levels,

precipitation and temperature values.

OUTPUT results

• water balance;

• for the water balance calculation the ALSUBT model was used. The ALSUBT model is based on

decomposition of precipitation in 5 components (snow, liquid precipitation, groundwater inflow,

evapotranspiration, surface runoff).

For the modeled area ( 1200 km 2) a model grid composed of 24622 rectangular cells

(250X200 m) was built.

The boundary conditions of the model are:

• on the north-eastern limit of the model a Dirichlet type boundary - constant head, given by the

piezometric head contour line of 100 m;

• on the north-western limit a Cauchy type boundary - potential flow dependent on the Bega River

( groundwater level is equal to the water level in the river );

• on the south-western limit of the model a Dirichlet type boundary - constant head, given by the

piezometric head contour line of 75 m;

• on the south-eastern limit a Cauchy type boundary - on the Timis river;

• the vertical limit of the hydrostructure is given by the bottom of the aquifer that has a no-flow

condition.

Results of the first mathematical model created for theshallow aquifer in the study area

Figure 7 - Geometry of the mathematical model

Figure 8 - West - East cross section

Figure 9 - North - South cross section

Figure 10 - Model Calibration - measured levels vs. calculated

levels Figure 11 – The piezometric map after calibration

Application of the FREEWAT Platform in Banat Plain (Romanian case study)

The shallow aquifer, with a good status from a quantitative point of view, is

mainly used as a water supply source for drinking water, for domestic use, as well in

industrial and agricultural activities.

The FREEWAT platform will allow the evaluation of groundwater resources of

the shallow aquifer and their availability for any future necessities.

LocationWestern part of Romania,

Central part of Banat Plain

Groundwater

bodies

ROBA01

ROBA02

ROBA03

ROBA04

Surface 1200 km2

Rivers

Old Bega

Timiș

Bega

Figure 12 – Study Area Location

Case study – Banat Plain, Romania

The Hydrogeological Model - Input Data

• Horizontal discretization of the study area

Number of cells: 51084 (250m X 250m)Simulation: Steady-state

Figure 13 – Horizontal

discretization



• Geometry of the hydrostructure

Figure 15 - Top of the

hydrostructure

Figure 14 - Bottom of the

hydrostructure



• Hydraulic

conductivity

Kx=Ky (10-30 m/day)

Kz (0.2 - 3.02 m/day)

Figure 16 – Horizontal variation of hydraulic conductivity



Elevation measurements on rivers were made alongside the rivers: OldBega, Timiș and Bega.

Figure 17 – Elevation

Measurements



• Piezometric

level

Figure 18 – The piezometric map resulted by interpolating the data collected

on the field



• Recharge

Figure 19 – Horizontal variation of the recharge



• Pumping wells

(Q = 77,6 m3/day)

Figure 20 – Locationd of the pumping wells from the Romanian National Hydrogeological Network


The Hydrogeological Model – Boundary Conditions

Figure 21 – Boundary conditions


Run Model

Figure 22 – Selected Boundary Conditions for simulationg the groundwater flow


Results

Figure 23 – Piezometric map and flow budget for the calibrated model

Figure 24 – Piezometric map for scenario 1


Scenarios: 1. Impact of new capture fronts on the aquifer system

Wells Q m3/day

Initial Wells 0,0009

New simulation 0,03


Scenarios: 1. Impact of new capture fronts on the aquifer system

Scenario 1Initial Model

Figure 25 - Flow budget comparison


Scenarios: 2. Increase of the water exploited from the study area with 50%

The effect is thedecrease of thegroundwater levelthroughout the modeledarea and the change ofthe river-aquiferrelationship.

Figure 26 – Piezometric map for scenario 2

Scenario for 2021-2050

• The average temperature will rise by 1.6 % and rainfall decreases by 4.2 %;

• These changes bring about a reduction of the aquifer recharge by about 8.5 %;

• The results of the model show that the groundwater levels decreases over theentire surface of the modeled area, with a maximum of about 0.73 m around thecity Timișoara. This means a reduction in the volume of the water resource.

Scenario for 2071 - 2100

• The average temperature will rise by 3.5 % and rainfall decreases by 5.3 %;

• These changes bring about a reduction of the aquifer recharge by about 15 %;

• The results of the model show that the groundwater levels decreases over theentire surface of the modeled area, with a maximum of about 1.72 m around thecity Timișoara. This means a reduction in the volume of the water resource.


Scenarios: 3. The impact of climate change


Scenarios: 3. The impact of climate change

Results of the simulatios for period 2021 - 2050

Results of the simulatios for period 2071 - 2100

Figure 27 – Piezometric maps for scenario 3

• 17 International Multidisciplinary Scientific GeoConference SGEM2017, 27 June – 6 July 2017, „Utilization of the FREEWAT Platform -FREE open-source tool for groundwater resource management,within pilot area Banat Plain”;


Disemination

• NIHWM Scientific Conference: Water, vital resource and risk factor –perspectives of integrated management, Bucharest, 11 – 12 of October2016, „FREEWAT - FREE and open source software tools for WATerresource management project – objectives and partial results” ;

• National Workshop: EU H2020 FREEWATPlatform for water resoursemanagement, Bucharest, 7 of September2017.

• 10-11 May 2017 – Bucharest, NIHWM headquarter, 19 participants;

• 16-17 May 2017 – Bucharest, Groundwater Engineering Research Centre from the Technical University of Civil Engineering Bucharest, 11 participants;

• 23-24 May 2017 – Bucharest, NIHWM headquarter, 26 participants;

• 29-30 May 2017 – Timisoara, Water Basin Administration Banat, 21 participants.


Training

Figure 28 – Training sesions

Thank you for your attention!

open workshop 1st freewat user and developers international … · 2017-12-26 · ada pandele,...

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