The phased approach to the groundwater monitoring programme for the Drini River Basin.
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Transcript of The phased approach to the groundwater monitoring programme for the Drini River Basin.
The phased approachto the groundwater monitoring programme
for the Drini River Basin
• Location and boundaries of groundwater bodies (3-dimensional conception)• Pressures to which the groundwater bodies are subjected• Thickness and permeability of the overlying strata• Degree to which groundwater bodies are at risk of failing to meet the WFD’s objectives
Delineation and Characterisation of Groundwater Bodies
IntegratedRiver Basin Management
(The content of the building is the so called River Basin Management Plan.)
Quantitative status Chemical status • surveillance monitoring • operational monitoring Criteria for status assessment and for identification/reversal of sustained upward trends Groundwater “Daughter” Directive
Monitoring Programme for Groundwater
• In case of risk of failing to achieve the Directive’s objectives: List of measures taken to achieve them • Measures taken to apply the principle of recovery of the costs of water use
Programme of Measures concerning Groundwater
Eco
nom
ic A
spec
ts a
nd I
nput
of
Sta
keho
lder
s
GIS
and
Rep
ortin
g
! Without a solid ground floor you cannot construct
a first floor !
The structure of the Water Framework Directive (WFD) concerning groundwater as a building
The step by step approach for development of the groundwater monitoring programme
prep
arat
ion
peri
od
until 08/2009
plan
ning
p
erio
d
Delineate and characterize groundwater bodies
I.
Analyse pressuresconcerning quan-titative and chemical status
II.
Compile available existing monitoring points= available monitoring network
III.
Develop the theore-tical necessary monitoring networks concerning quantita-tive and chemical status
IV.
Compare the theore-tical necessary monitoring networks with the available network; Analyse gaps
V.
until 10/2009
[mid
dle-
term
per
iod]
[~
18
mon
ths]
build
ing
peri
od
Identify the lo-cations for new built observation wells to close the gaps
VI.
Build newobservation wells
Old observation wells of the former Yugoslav period
Abstraction wells and springs (raw water) for drinking water supply
Other existing monito-ring points [e.g. self-supply of households; mining companies]
The Kosovan groundwater monitoring networks for quantitative and chemical status
New builtobservation wells
! The more appropriate existing monitoring sites are identified the less have to be
constructed !
Working step I, slide 1 Delineation of groundwater bodies
Preliminary delineated groundwater bodiesin Drini River Basin
Delineation according to the following attributes:- Groundwater watersheds (divides), or ,if not available, topographic map and surface water sub-basins- Rock type- Type of general hydraulic characteristics- Age and geometry (3-D concept) of lithostratigraphic units
Reasonable sizes of groundwater
bodies between 154 km2 and 579 km2
Working step I, slide 2 Delineation of groundwater bodies
The main purpose of identifying „water bodies“ is to enable the status to be accurately described and compared to environmental objectives. This does not mean that a groundwater body must be delineated so that it is homogeneous in terms of its natural characteristics.
A groundwater body means a distinct volume of groundwater within an aquifer or within several aquifers.
! A groundwater body is more or less a “pragmatic working
unit” for the authorities !
A sub-division (fragmentation) of ground-water into unmanageable numbers of groundwater bodies should be avoided in order to reduce administrative burden.
The delineation of groundwater bodies should be regarded as an iterative process, possibly refined over the time!
Compile data on human activities and identify the different types of pressures concerning quantitative status chemical status - abstraction - diffuse sources of pollution for water supply and (because of land use) for irrigation - point sources of pollution
Decide on the likely effects of identified human activities/pressures on groundwater
Assess vulnerability to the effects of pressures
Determine the relevant pollutant input areas concer-ning diffuse sources of pollution anddefine the significant point sources of pollution at which monitoring points downstream have to be con-structed = Necessary
working tools or data
Calculated balance between recharge and abstraction
or
Working step II, slide 1 Pressure analysis (whole procedure)
Use of existing groundwater level
data
GroundwaterVulnerability Map
Land Use Map
Cadastre of landfills, other contaminated
sites, mines etc.
areas wherepotential diffuse source pressures [settlement and industrial area] are combi-ned with high natural vulnerability to pressures[permeable overlying strata or impermeable overlying strata with a thickness less than 5 m]
Target concerning to diffuse sources of pollution:Identification of areaswhere the monitoring activities have to focus on= relevant pollutant input areas
Result of Superposing/Combinationof Land Use Mapand Groundwater Vulnerability Map
Working step II, slide 2 Relevant pollutant input areas
=
Key principles for design of the groundwater chemical status monitoring programme (1)
decreasingnatural protectioneffect of theoverlying strata= increasing natural vulnerabi- lity of the ground- water body
increasing size of pollutant input area and/or increasing magnitude of pressures
increasing density of the chemical status monitoring network and increasing monitoring frequency
- Land Use Map - Map or Cadastre of point sources of pollution
- Groundwater Vulnerability Map
- Map of the chemical status monitoring network
Superposition/Combination
Identification of areaswhere the monitoringactivities have to focus on
! Pressure oriented measuring !
Potential relevant effects of pressures
(i.e. the hazard)
Likely effects of pressures
Natural characteristics ofthe groundwater body that determine its vulnerability
Expert problem solving by GIS