DROUGHT PLANNING IN SPAIN: THE JUCAR RIVER BASIN CASE

Laura Tanco BallesterosHydrological Planning OfficeJucar River Basin Authority

The Jucar River Basin District

Where we are…

Description of the JRBD

Surface (km2) 42.735

Permanent population (2012)

5.178.000

Total equivalent population (2012)

5.697.000

Irrigated surface (ha) 390.000

Total inflow (hm3/year) 3.800

Total water demand 2012 (hm3/year)

3.240

Water resources systems

Population Irrigation

Water demands and resources in the JRBD

49,55%45,63%

2,14%0,09% 2,58% Total demand per source

SuperficialSubterráneoReutilizaciónDesalación

79,2%

16,2%

3,8%0,4%0,4% Total demand per use

AgrícolaUrbanaIndustrialGanadera

Precipitación20.700

hm3/año Evapotranspiración16.819 hm3/año

.

Escorrentía superficial directa.

Reca

rga

al a

cuífe

ro

Componente superficialAportación Superficial:Red Fluvial: 3.091hm3/añoSecundaria: 295 hm3/año

Transferencias subterráneas al mar

519 hm3/año

Componente subterránea.

Recarga

1980/81-2016/17

01.0002.0003.0004.0005.0006.0007.0008.000

hm3

Surface inflow (hm3) en la DHJ

Aportación Superficial Media 1940/41-2016/17

Balance

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400

ene feb mar abr may jun jul ago sep oct nov dic

hm

3

Demanda mensual UTE 5 Recurso natural promedio UTE 5

Reservoirs

Groundwater bodies

It leads to…

Quantitative groundwater status

Water Exploitation index in the EU (expected for 2030).

Source: EEA

Concepts

Definitions• Drought: Unpredictable natural phenomenon that comes about mainly due to a lack of

precipitation which leads to a temporary but significant decrease in the available water resources (definition 62 of the Hydrological Planning Instruction, approved by Ministerial Order ARM/2656/2008, of 10th September).

• Prolonged drought: Drought produced due to exceptional circumstances or other circumstances that could not reasonably be foreseen. The identification of these circumstances is achieved by using indicators related to the lack of precipitation during a time period and taking into account aspects as its intensity and duration (definition 63 of the Hydrological planning Instruction).

• Scarcity: Situation of lack of sufficient water resources to meet the demand of water foreseen in the respective hydrological plans, once the environmental restrictions have been secured.

• Structural scarcity: Situation characterised by a continuous shortage of water resources that impedes the compliance of the guarantee criteria regarding water demands established in the hydrological plan.

• Conjunctural scarcity: Situation of discontinuous water scarcity that while allowing the compliance of the guarantee criteria regarding water demands established in the hydrological plan, it, however, temporarily limits the supply in a significant way.

Historical droughts

Comparative analysis of different types of indicators: SPI3, SPI12, PDSI, ANDVI, IEE

Legal Framework for drought management in Spain

• Spain has sufferedimportant drought periodswith severe impacts onwater resources and wateruses.

•Traditionally, droughtshave been considered asan emergency situation tobe restored withextraordinary waterresources and measures(art. 58 W.L)

Drought management as emergency situation

Spatial distribution of the percentage of annual precipitation deviation with respect to the average of the reference series (1980/81-2011/12).

Law 10/2001, July 5, of the National HydrologicalPlan, establishes the bases for the droughtplanned management:

Policy bases for Drought Management Plans

The Ministry of Environment willestablish a global hydrologic indicatorsystem to foresee drought situations andto serve as general reference for theformal declaration of droughts.

River Basin Organisations will developDrought Management Plans (DMP).

Public Administration in charge of publicwater supply for population greater than20.000 inhabitants will develop anEmergency Plan for Drought Situations.

National indicator system

Objective: minimise environmental, social and economic impacts of drought situations

Entities in charge: River Basin Organisations

Contents: includes diagnosis of situation, hydrological indicator system, programme of measures and management and follow-up system.

Approval: Ministerial Order in 2007 (Revision approved in 2018)

Drought Management Plans

Main contents of the Jucar Drought Management Plan

Basic elements of the Special Drought Plan

• Drought characterisation and diagnose

• Indicator system in situations of prolonged drought andoccasional water scarcity

• Measures and actions to develop during the different phasesof drought and water scarcity

• Drought follow-up and post-drought reports. Assessment ofsocioeconomic and environmental impacts

• Reference framework for supply emergency plans

Indicators

6 de febrero de 2018

Castellón de la Plana

Indicator system

Double system: indicators of prolonged drought and scarcity indicators

Indicators for prolonged drought:identify persistent and intensesituations of decreased rainfall,reflecting contributions in naturalregime.

Indicators for scarcity: identifysituations of difficulty to meet demandsdue to occasional shortage.

Territorial units of analysis:

• Exploitation systems for scarcity(UTE)

• Subdivision of exploitation systemsfor prolonged drought (UTS)

Indicator system for prolonged drought (IES)

From precipitation data of 47pluviometers (SPI12)

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01/1

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8001

/06/

1981

01/0

2/19

8201

/10/

1982

01/0

6/19

8301

/02/

1984

01/1

0/19

84

01/0

6/19

8501

/02/

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01/1

0/19

8601

/06/

1987

01/0

2/19

8801

/10/

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01/0

6/19

8901

/02/

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01/1

0/19

9001

/06/

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01/0

2/19

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9201

/06/

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01/0

2/19

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/10/

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01/0

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/02/

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01/1

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/06/

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01/0

2/19

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/10/

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01/0

6/19

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/10/

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01/0

6/20

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/02/

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/06/

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/10/

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6/20

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/02/

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01/1

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01/0

6/20

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/02/

2008

01/1

0/20

0801

/06/

2009

01/0

2/20

1001

/10/

2010

01/0

6/20

1101

/02/

2012

IES Límite IES sequía prolongada

Normalized monthly indicator between 0and 1.Below 0,3 prolonged drought is considered.

Scarcity indicator system (IEE)

From rainfall data, piezometry,gauging and entries to reservoirsdammed volume. - Partial indicators representative of

attended demands.- Construction of a UTE indicator

based on the weight of the demandsserved.

- Calibration using models that showhistorical shortages.

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Déf

icit

(h

m3 )

IEE

Normalidad Prealerta Alerta Emergencia Déficit IEE

Aggregation per water resources systemCód.

indicatorUTE

Indicatorvalue

CoeficientValue of IEE

Feb.2019VE01

Cenia-Maestrazgo

0,66 0,34

0,73PZ01 0,70 0,22PZ18 0,82 0,22PL01 0,79 0,22EE01

Mijares-Plana de Castellón

0,65 0,11

0,69VE02 0,91 0,42PZ02 0,76 0,11PZ03 0,52 0,18PZ04 0,34 0,18EE02

Palancia-Los Valles

0,52 0,25

0,62VE03 0,52 0,35PZ05 0,85 0,20PZ06 0,68 0,20VE04

Turia

0,66 0,08

0,60

EA01 0,93 0,09EE03 0,62 0,04EA02 0,64 0,09VE05 0,63 0,42PZ07 0,38 0,08PZ08 0,77 0,08PZ09 0,03 0,08PZ10 0,62 0,04EA03

Júcar

0,42 0,23

0,53

EA04 0,55 0,20PZ11 0,53 0,03EA05 0,59 0,03EA06 0,46 0,03PZ12 0,06 0,03VE06 0,52 0,03PL03 0,48 0,03VE07 0,64 0,36PZ13 0,36 0,03PZ14

Serpis0,48 0,31

0,30VE08 0,21 0,69PZ15

Marina Alta0,11 0,58

0,15PL05 0,21 0,42

VE09 Marina Baja 0,26 1,00 0,26PL06 Vinalopó-

Alacantí

0,38 0,100,32PL07 0,37 0,66

PZ17 0,14 0,24

Starting scenarioEntry

Condition IEE During Final scenario

Normal< 0,5 3 consecutive months

Prealert< 0,3 2 consecutive months

Prealert < 0,3 2 consecutive months AlertAlert < 0,15 2 consecutive months Emergency

IEE Status

0,75 – 1,00 NORMAL

0,50 – 0,75

0,30 – 0,50 PRE-ALERT

0,15 – 0,30 ALERT

0,00 – 0,15 EMERGENCY

Follow- up report

The follow-up report is published every month in the JRB webpage.Decision making is based on the drought diagnose.

Measures in the Drought Plan

6 de febrero de 2018

Castellón de la Plana

Type of measures in water scarcity

Scarcity scenarios

Status situation No scarcityModerate

scarcitySevere scarcity Serious scarcity

Scarcity scenarios Normal Prealert Alert Emergency

Type of actions and measures

activated

General hydrological planning and monitoring

Awareness, savings and monitoring

Management measures (demand

and supply), and control and monitoring

(Article 55 of the MTWA)

Intensification of measures considered on

alert and possible adoption of exceptional

measures(Article 58 of the MTWA)

Actions to be taken in the prolonged drought scenarios

Justified admission of the temporary deterioration of the state of water bodies due to exceptional natural causes

Ecological flow regime less demanding

The SDP includes data sheets with specific measures to deal with scarcity situations ineach of the territorial units.

Data sheets with specific measures for scarcity per UTE

UTE 2 Mijares-Plana de Castellón

Status Examples of specific measures to adoptCompetentAuthority

Prealert

Activate emergency plans for the supply systems of Almassora, Burriana, Castelló de la Plana, Vall d'Uixó, Onda, Vila-real and Consortium of Aguas de la Plana as well as those systems that in the future reach 20,000 equivalent inhabitants

RelevantMunicipalities

Analysis of the possibilities of using new resources contributed by reuse from the WWTP of Almenara, Almassora, Borriana, Xilxes, Llosa, Moncofa, Vall d'Uixó and Castelló de la Plana.

CHJ y GV

… CHJ y GV

Alert

Materialisation of the possibilities of taking advantage of new resources contributed by desalination from the IDAM of Oropesa and Moncofa

CHJ

Restriction of up to 100% of the surface supply to the mixed irrigations of the Mijares, with respect to its surface consolidated demand, taking into account the application of the Bases Agreement for the Regulation of the Mijares River.

CHJ

Reinforcement of surveillance actions for the conservation and protection of the resource and aquatic ecosystems considering the protection of wetlands, the protection of fluvial species and the impact of other measures on the natural environment, with special attention to the Marjal d'Almenara.

CHJ y GV

…

Emergency

Intensification of the possibilities of using new resources contributed by desalination from the IDAM of Oropesa and Moncofa.

CHJ

Start of the restrictions to protect the available surface resources: between 15 and 25% of the supply to the traditional irrigations of the Mijares with respect to its consolidated demand.

CHJ

Restriction of up to 100% of the surface supply to the mixed irrigations of the Mijares, with respect to its surface consolidated demand, taking into account the application of the Bases Agreement for the Regulation of the Mijares River.

CHJ

Start of saving measures to protect the underground resources available in bodies of groundwater in poor quantitative state, especially in Plana de Castelló: reduction of up to 15%.

CHJ y users

…

Examples of specific measures: restrictions

Demand Unit SourceReduction percentages

Normal Prealert Alert EmergencyUrban supplies Surface 0% 0% 0-5% 0-10%

Real Acequia de MoncadaSurface

0%5-15% 20-30% 25-35%

Total 5-15% 10-20% 15-25%

Vega de ValenciaSurface

0%5-15% 30-40% 35-45%

Total 5-15% 10-20% 15-25%

Pueblos CastilloSurface

0%5-15% 10-20% 15-25%

Total 5-15% 10-20% 15-25%Irrigation of the main Canal

in Camp de TúriaSurface

0%10-20% 30-40% 45-55%

Total 5-15% 10-20% 15-25%

Established reduction percentage to users from UTE 4 Turia

Examples of specific measures: restrictions on ground water bodies

• Initiation of saving measures to protect the resources availablein groundwater bodies with poor quantitative status: generalreduction up to 15% of abstractions for irrigation, dependingon the territorial unit and the scenario.

• These restrictions will apply, especially in those groundwaterbodies with significant abstractions for urban use or withspecial relation to surface water or protected natural spaces.

• This percentage of average reduction of 15% can be distributedspatially depending on the affection of groundwaterabstractions to surface water or protected spaces.

Irrigable area

Code NameNº

abstractions

Abstraction volumen according to scenario(hm3/year)

Total capacity

Prealert Alert Emergency

Acequia Real del

Júcar

080.141Plana de Valencia

Norte1 0,4

12,1 24,2 24,2

080.142Plana de

Valencia Sur37 23,8

Canal Júcar-Turia

080.140Buñol -Cheste

13 5,1

3,4 6,8 12,0080.141

Plana de Valencia

Norte5 2,3

080.142Plana de

Valencia Sur9 4,6

Real Acequia Escalona

080.142Plana de

Valencia Sur2 2,0 1,0 2,0 2,0

Real Acequia

Carcaixent080.142

Plana de Valencia Sur

3 2,6 1,3 2,6 2,6

Acequia de Quatre Pobles

080.142Plana de

Valencia Sur3 2,0 1,0 2,0 2,0

Total 73 42,8 18,8 37,6 42,8

Abstraction volumes through drought wells according to scenario in UTE 5 Júcar

Examples of specific measures: drought wells

Control of abstractions in drought well extractions in UTE Júcar

Examples of specific measures: drought Wells monitoring

• Improvement of thepiezometric control in theareas of influence of thedrought wells, especially inl'Albufera of València.

Percentage of distribution of the supply from the Turia and Júcar to the Metropolitan Area of Valencia.

Water scarcity scenario in the UTE JúcarNormal Prealert -Alert Emergency

Turia Júcar Turia Júcar Turia Júcar

Water scarcity

scenario in the UTE Turia

Normal 45% 55% 55% 45%

Prealert - Alert 20% 80% 50% 50%

Emergency 10% 90% 20% 80%

Examples of specific measures: changes in source

Intensification of the possibilities of using new resources contributed by reusefrom the WWTP of the system, especially of the Carraixet Basin, Paterna-Fuentedel Jarro, Pinedo, Pobla de Farnals and Quart-Benàger.

Examples of specific measures: non-conventional resources

• As established in the regulations,the River Basin Management Plan,in situations where the scarcityindex reaches the pre-alert status,will encourage the use of theseresources by the irrigation systemaccording to their current licences.

Volumes from desalination according to scenario in UTE 8 Marina Baja.

User

Volume from the Mutxamel desalination plan according to scenario

(hm3/year)Prealert Alert Emergency

Consorcio de Aguas de la Marina Baja

0 1-3 5-8

Examples of specific measures: non-conventional resources

Status Measures to adoptCompetentAuthority

Emergency

Reinforcement of surveillance actions for the conservation and protection of resources and aquaticecosystems considering the protection of wetlands and fluvial species and the impact of othermeasures on the natural environment with special attention to L’Albufera of València, the middlestretch of the Júcar as it passes through La Mancha plain and the final stretch of the river, downstreamof the Tous dam, including the Massalavés spring.

CHJ, GV y JCCLM

Application of specific monitoring programmes to record the environmental impacts associated withcritical episodes, with special attention to L’Albufera of València, the middle section of the Júcar as itpasses through La Mancha plain and the final section of the river, downstream of the Tous dam,including the Massalavés spring.

CHJ, GV y JCCLM

Examples of specific measures: environmental impact reduction

Specific environmental measures in the emergency scenario in UTE 5 Júcar

In order to safeguard environmental conditions, aminimum volume is set for exploitation purposes,and in all cases environmental managementmeasures must be initiated as volumes close to theindicated value are reached.

ReservoirMinimun Volume

(hm3)

El Arquillo de San Blas 1

Benagéber 10

Loriguilla 2,5

Alarcón 30

Bellús 6

Contreras 15

Forata 0,75

Tous 39

Beniarrés 2

Júcar river in summer 1995 Júcar river in summers 2006

A picture is worth a thousand words

Thanks for your attention!

1

Water scarcity and drought water management

Context in France and case study in Languedoc Roussillon area

2

Regional scaleWater policy adapted to basin conditions

6 rivers Basin Organisation created in 1964

=> River Basin Management Plan at basin/district scale

Water policy at the regional and department scale

New regions (2016) DepartmentsOld regions and Languedoc Roussillon

3

Water resource in France

Water ressource in FranceA country with comfortable water resource, generally abundant

Heterogeneous distribution of water resource in territories and in time (resource /abstractions)

⇒ Development of the agricultural irrigation in the 70s and 80s to face the dry season

Management 1970-2008Legal procedures for each abstraction / withdrawal without the assessement of the impact of cumulative abstractions Crisis management through restriction measures (drought decree)

=> authorization of all abstractions and regulation with restriction measures, years with low water resource

=> current reform from 2008 = to adjust legal rights and allocation with water resource

Actions to decrease the deficitActions to keep the balance

4

River Basin Management Plan Mediterranean and Rhône 2009-2015 / 2016-2021

Many river basins with a structural deficitWater uses >> water resource

Mainy rivers (11) in the Languedoc Roussillon area�Cèze, �Gardons, �Vidourle, �Lez Mosson, �Hérault, �Orb, �Aude, �Agly, �Têt, �Tech, �Sègre

Montpellier

Fundamental orientation 7 = quantitative water managem ent ⇒ Studies to be implemented to assess water resource called

« studies of the abstractable volumes »

5

Quantitative water management in France and European Water Framework Directive (2000)

Structural deficit not compliant with the European Water Framework Directive objectives- good ecological status for surface water bodies - good quantitative status for groundwater bodies

⇒ Reform of the quantitative water management in order to balance consumptions with ressource

⇒ Studies of the abstractable volumes (2009-2015) for the river basins with a structural deficit

⇒ Territorial plans (2016-2018 elaboration, 2019-2021 implementation) : water savings, water transfers, water storage and new dams, deep groundwater, crisis management

6

Circular of the Ministry of Ecology towardsquantitative resource management

30 th June 2008���� Principles

To ensure the balance between water resource, the legal water

abstraction and the ecological minimal flow, without using

restrictions statistically 8 years over 10

=> Focusing on river basins with structural deficit

=> Crisis management every year => once every 5 years (2/10)

=> Assessment of water resource to be shared between differentuses (studies) through terrirorials plans

⇒ Delineation of areas of high deficit over 30 %

=> Development of collective irrigation within hydrological unitswith high water demand to be managed by local water usersassocation

Legal procedure related to abstractions

e

1.1.2.0 – abstraction in groundwater through a drill

> 200 000 m3/year => AUTORIZATION-

[ 10 000 m3/year to 200 000 m3/year] => DECLARATION-

1.2.1.0 – abstraction in surface water resource

(within river bank aquifer)

> 1000m3/h or 5% Q5* =>AUTHORIZATION-

[400 to 1000m3/h] or [2% 5%]of Q5* => DECLARATION-

*Q5 = mensual natural flow of a driest year over five

2 types of procedures : authorization or declaration french law water of 1992

Domestic abstractions are not concerned ( <1000m3/year )

8

Areas of high structural deficit (over 30%)

���� Legal text : section L211-2 et R211-71 CE

Hydrological unit suffering from deficit, not due to exeptionnal drought = permanent and structural deficit due to abstractions

�Consequencies

Reinforcement of the legal protection of water resource / decrease of the thresholds for the legal procedure of declaration and authorization

Awarness of actors to the scarcity of water resourceNew abstractions are forbidden and all existing abstractions (except domestic) need to be regularized, through declaration authorization procedure

Increase of the water price

above 8m3/h => AUTHORIZATION-

under 8m3h => DECLARATION-

Legal procedure related to abstractions

�Temporary authorization for a seasonal activity (text. R214-24)

< 6 months

without significant and sustainable impact on the resource

in areas of high structural deficit : stopped from 2016 and

managed by the local water users association (irrigation

abstractions)

���� Counting obligation

Each water user has to meter and count its consumptions

and to send it to the administration

10

Reserved /minimal flow downstream from an abstraction permanent device in the river bed

Needs of aquatic environment :

Ecological flowReserved flow in the bypassedportion of theriver

WaterWaterWaterWater abstractionabstractionabstractionabstraction

Minimal instantaneous flow allowing life, moving andreproduction of aquatic ecosystem : from a study or from hydrological values (10% of the average of annual flows)

irrigation

restitutionrestitutionrestitutionrestitution

11

Studies of the abstractable volumes : different steps

- step 1: Strategic points and characterization of river basins

- step 2 : Assessment of abstractions

- step 3 : Natural hydrology flows

- step 4 : Needs of aquatic ecosystem

- step 5 : Assessment of abstractable volumes

- Notification of the results to be used in the territorial plans

12

Step 1 Characterization of river basins and identification of nodal and strategic points

Studies of the abstractable volumes

Characterization : geology, climatology, occurency of droughtsand crisis management, land uses, water abtraction

Identification of sub-basins and nodal points=> units of resource management

Nodal points located on the river⇒ calculation points (asbtractions/ consumptions, hydrology,

needs of aquatic ecosytem, mensual flow objectives )

Selection of 2 or 3 strategic points=> to be inserted in the master plan (RBMP) and become legal

13

Step 1:Identification of nodal and strategic points

Irrigation abstraction (Gignac union)

Aval restitutions irrigation ASA Gignac

Dowstream the restitution of Gignac irrigation

Dowstream theabstraction for drinkable water (SBL)

Studies of the abstractable volumes

1414

Studies of the abstractable volumes

Step 2 : Assessment of the abstractions / evolution

Use of the different data bases : Water agencies (environmental

taxes), state authorities (water rights and quality data),

Irrigation : General Agricultural Inventory

Assessment of water demand according to agronomic models and

ratios for households

Use of population projections

Field investigations to measure flows and abstractions

1515

Studies of the abstractable volumes

Step 2 : Assessment of the abstractions / evolutionAsbtractions <> consumption Restitutions from irrigation and water treatment plantsLanguedoc Roussillon area : preponderance of gravity irrigationwith important restitutions ( around 60% of the abstraction)

Abstraction = Consumption + restitutions to the river

For irrigation :

consumption for irrigation = plants needs + water lost for the river

For drinkable water

Restitution via water treatment plants

Abstraction

Leakage

Diffuse restitution

Abstraction out of the catchment

Consumption out side the catchment

Weight of the different usesIrrigation : 50 to 90 %Drinkable water : 20 to 50 %Industry : around 2%

16

Bassin de la Têt : prélèvements bruts et nets

-

5

10

15

20

25

30

35

40

janv fevr mars avril mai juin juil aout sept oct nov dec

Mill

ions

dxe

m3

Brut

Net

Studies of the abstractable volumesStep 2 : Assessment of the abstractions

Difference between abstractions and consumptionsBig abstractions and consumptions during the dry season (irrigation and tourism)

Abstractions

consumption

Milli

ons

of m

3M

illion

s of

m3

Milli

ons

of m

3M

illion

s of

m3

17

Studies of the abstractable volumesStep 3 : Natural hydrology (= resource)

Influenced hydrology + consumptions = natural hydrology

Flows m3/s

Add of consumptions

Daily flows measuredby hydrometric stations and influenced by consumptions

Natural daily flows without any consumptions

18

Analysis of hydrometric data (national database HYDRO) Chronic of data 1995-2015 => current climateCharacterization of the influenced hydrology (=flows m3/s)Return period : driest year over 5 (rules of the 2008 circular)+Consumptions (= thousands or millions of m3 a month or m3/s)

⇒ Natural hydrology (mensuals values of flows for each nodal point)

Qnat_1/5 of June : lowest June flow that occurs once every 5 years

Qnat_1/5 of July,

Qnat_1/5 of August

Qnat_1/5 of September…

In some cases, use of hydrological models (rain + geolgy => runoff)

Studies of the abstractable volumesStep 3 : Natural hydrology (= resource)

Influenced hydrology + consumptions = natural hydrology

19

Q influencés

Q naturelsQ usages

Q naturels

Q usages

Q influencés

Q influencés

Q naturels Q usages

Extrapolation

Station hydrométriquePoint nodal

Débits caractéristiques

Surface extrapolation from the hydrometric stations to g et the hydrology (influenced and natural) on the nodal poi nts

Studies of the abstractable volumesStep 3 : Natural hydrology (= resource)

Hydrometric stationNodal point

Hydrologic parameters

consumptions Natural flows

consumptions

consumptionsNatural flows

Influenced flows

Natural flows

Influenced flows

Influenced flows

20

Natural hydrology and impact of consumptions

Studies of the abstractable volumesStep 3 : Natural hydrology (= resource)

Flows m3/s

Consumptions 1 m3/s

Monthly flow influenced by consumptions 5 m3/s

Needs of aquatic ecosystem

21

Good ecological status for surface water bodies (WFD) = flows to ensure the needs of the aquatic ecosystem

Habitats methods (Estimhab ) : statistical model to estimate theimpact of the management on the aquatic habitat

Hydraulics methods (wet perimeter )

+ Analysis regarding quality

Studies of the abstractable volumesStep 4 : needs of the aquatic ecosystem

Potential habitatPotential habitatPotential habitatPotential habitat for the fishes ( EstimhabEstimhabEstimhabEstimhab))))

22

strategicnodal point

Studies of the abstractable volumesStep 5 : assessment of abstractable volumes

Natural hydrology – ecological needs = abstractable volume s

Low flows (m3/s)

Qnat 1/5 June Qnat 1/5 July Qnat 1/5 August Qnat 1/5 Sept.

(m3/s)Q (m3/s)

To be comparedto currentabstractions

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Analysis of the current situation- Comparison between abstractable volumes and currentconsumptions- Reduction rates of the current consumptions, to recoverbalance- River with dam => use of the 5 last years chronic of dam regulation- First version/draft of territorial plans will study scenarios of sharingthe volumes and water saving actions

Studies of the abstractable volumesStep 5 : assessment of abstractable volumes

Analysis of the futur situationProjections of populationClimate changesRecovering balance in the current situation = first step of the challenge

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After the studies of the abstractable volumes

Notification of the results to the local authority

Technical synthesis by the regional authority : - maps of reduction rates- tables of abstractable volumes and flows and especially the mensual flow objectives = legal quantitative objectives

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Maps of reduction rates for the Tech riverScenario with current needs

< 10%< 10%< 10%< 10%

betweenbetweenbetweenbetween 10% 10% 10% 10% andandandand 30%30%30%30%

> 30%> 30%> 30%> 30%

Strategic points /master plan (SDAGE)Strategic points /master plan (SDAGE)Strategic points /master plan (SDAGE)Strategic points /master plan (SDAGE)

Local nodal pointsLocal nodal pointsLocal nodal pointsLocal nodal points

Local nodal points onLocal nodal points onLocal nodal points onLocal nodal points on affluentsaffluentsaffluentsaffluents

Hydrometric station for low flow (DREAL)Hydrometric station for low flow (DREAL)Hydrometric station for low flow (DREAL)Hydrometric station for low flow (DREAL)

After the studies of the abstractable volumes

Notification of the results to the local authority

ReductionReductionReductionReduction rates of rates of rates of rates of the consumptionsthe consumptionsthe consumptionsthe consumptions for for for for august august august august

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Situation of the river basins in Occitanie

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After the studies of the abstractable volumes

Notification of the results to the local authority

=> Territorial plans (2016-2018 elaboration, 2019-2021 implementation):

- water savings,

- water transfers (balanced/secured resource Rhône or deepgroundwater),

- water storage in winter/automn and new dams,

- DOE mensual flow objectives,

- crisis management

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Mensual flow objectivesfor quantitative and crisis management

Flows 2018m3/s

1/ Needs of ecological ecosystem + volumes for dowstream users discussed in the plans2/ Mensual flow objectives for quantitative management :

mensual flow sept 2018 < DOE = > year 2018 not ok3/ Can be reached if terrorial plans and savings are implemented

DOE

JulyAugust

September

End of restrictions

4/ First level of crisis restriction : alert

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Propluvia : the national information system for crisis management Propluvia

Management on an hydrographic unit called « alert area »5 levels : normal, vigilance (moderate), alert (low), reinforced alert(severe), crisis (very severe)Thresholds : VCN3 for rivers (lowest 3 days mobile average of a 10 days period of month)Restriction measures

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RBMB = identification of river basins with structural deficit 2009

Studies of the abstractable volumes 2009-2016

Notification of the results to the local authority 2014-2016

Territorial plans2016-2021 Elaboration/implementation- water savings- water transfers- water storage andnew dams- deep groundwater- improvement of management

Legal actions

- identification of area of high structural deficit- collective irrigation- reserved flows- update of rightsaccording abstractablevolumes

! Strong demand for vineyardsirrigation to face CC

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Thank your for your attention

Regional Department of Environmental, Planning and Housing (DREAL), Montpellier

E.Balloffet - April 2019

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22 hydrographical regions for flood forecasting and hydrometric monitoring assembling the competenceof different departments

SPC Flood Forecasting Department at DREAL Regional Environmental Department