Segura Hydrographic Confederation
Segura Hydrographic Confederation
Pza. Fontes, 1
30001 Murcia
Tel.: 34 968 35 88 90
Fax: 34 968 21 18 45
http://www.chsegura.es/chs/index.html
- Segura Basin Water Plan
Water Law 29/85:
Water is a scarce natural resource essential for life and for the exercise of the vast majority of economic activities.
Surface water and groundwater, nature and role identity, are renewed by the hydrological cycle and should be available not only in quantity but also necessary to precise quality.
Demand for water planning and forecasting future conditions and situations, so as to minimize the socio-economic costs of resource availability and establish an equitable allocation of the workload.
The water plan should: get the best satisfaction of water demands and to balance and harmonize regional and sectorial development, increasing the availability of the resource, protecting its quality, saving their jobs and streamlining its use, in harmony with the environment and other natural resources.
| Hydrological planning | |||
|---|---|---|---|
| General economic planning | |||
| Territorial planning | Environmental planning | Energy planning | Land planning |
| Urban and industrial development | Conservation of nature | Energy efficiency plans | Improvement and modernization of irrigation |
| Supply and sanitation | Environmental flows | Renewable energy | New irrigation schemes |
Contents of the River Basin Management Plans
Art. 40 Water Law
- inventory of water resources
- uses and demands
- priority criteria and compatibility of uses
- allocation and resource reservation
- the basic characteristics of the water quality
- the basic rules on irrigation improvement and transformation
- protection zones for the conservation and resource recovery
- plans hydrological-forestry and soil conservation
- guidelines for groundwater recharge and protection of aquifers
- basic infrastructure
- criteria for evaluating the energy use
- studies and actions to prevent flood damage, floods and other water phenomena
Historical background
- The national water works, 1902
- 1887 defense plan
- The national water works in 1933.
- Segura basin, the hydrological imbalance, transfer to the Segura, the left channel and right bank. Irrigating 125,000 hectares
- Comprehensive use of the upper basin (1941)
- Hydroelectric header. Harmonization with the irrigation
- The decree of 1953
- Allocation of volumes to Las Vegas. The surplus resources.
- The Tajo Segura
- Redotación and expansion of irrigation
- Territorial scope
- Population
- Climate
- Land use
- Resource Allocation
- Irrigated areas
- Water resources
- Allocation of new resources
- Supply, C. Industrial Products and Services
- Defenses and channeling
- Drainage and water treatment
- Marshes
- Hydroelectric
- Water quality
| Andalucía | 1.780 Km2 |
| Castilla - La Mancha | 4.713 Km2 |
| Región de Murcia | 11.150 Km2 |
| Comun. Valenciana | 1.227 Km2 |
| Andalucía | 17.424 hab. |
| Castilla - La Mancha | 65.927 hab. |
| Región de Murcia | 1.032.275 hab. |
| Comun. Valenciana | 197.597 hab. |
| Temperature (range of variation) | 10-18ºC |
| Maximun temperature | 45ºC |
| Pluviometry (range of variation) | 200-1000 mm |
| Average pluviometry | 365 mmm |
| Potential evapotranspiration (range of variation) | 600-950 mm |
| Average potential evapotranspiration | 827 mm |
| Irrigation | 13% |
| Other arable land | 30% |
| Forest | 27% |
| Other arable land | 26% |
| Unclassifiable | 4% |
| Decree of 1953 | ||||||
|---|---|---|---|---|---|---|
| a) Approach (Trad. + Legal + Nuevos) | b) Actual values | |||||
| Total (HA) | Average strength (m3/Ha) | Total Volume (Hm3) | Total (Ha) | Average strength (m3/Ha) | Total Volume (Hm3) | |
| High zone | 16.000 | 7.100 | 113 | 13.454 | 7.629 | 102 |
| Medium zone | 18.000 | 8.260 | 148 | 11.090 | 7.754 | 86 |
| Low zone | 25.000 | 8.260 | 206 | 27.297 | 6.562 | 179 |
| Total | 59.000 | 0 | 467 | 51.841 | 0 | 367 |
| Surplus (Mula, Lorca y Cartagena) | 0 | 0 | 66 | 0 | 0 | 9 |
| Leftovers (RLMI) | 0 | 0 | 0 | 0 | 0 | ~=30 |
| First phase of water transfer (Ley 52/1980) | |
|---|---|
| For irrigation | Hm3 |
| Vega Alta y Media del Segura | 65 |
| Regadíos de MUla del Segura | 8 |
| Lorca y Valle del Guadalentin | 65 |
| R. de Levante, M.I. y M.D. V. Baja del Segura y Saladares de Alicante | 125 |
| Campo de Cartagena | 122 |
| Almeria | 15 |
| Total regadíos | 400 |
| Para abastecimiento urbano | 110 |
| (*) Pérdidas (15%) | 90 |
| Total | 600 |
(*) By agreement of the Central Board for the Exploitation of the Tajo-Segura, the figure is 10% (60Hm3) in view of studies and data from the first years of operation of the Aqueduct.
| Estimated areas | R. Compl. Trasvases | Total |
|---|---|---|
| Vegas Segura y otras zonas regables superficiales | 0 | 102.421 |
| Subterráneas | 0 | 114.126 |
| Trasvases | 0 | 0 |
| Redotación | 74.025 | 0 |
| Nuevos regadíos | 0 | 52.482 |
| Totales | 74.025 | 269.029 |
| Previous estimates | Year | Hm3 |
|---|---|---|
| P:N:O: Hidraúlicas C. segura | 1933 | 860 (sólo río Segura) |
| Centro de Estudios Hidrográficos | 1967 | 950 (Sólo rio Segura) |
| Doc. Básica Plan Hidrol. Cuenca | 1992 | 1.000 (Total cuenca) |
OWN RENEWABLE RESOURCES: 1.000
Drain the sea R. Segura: -50
Drain the sea R. Costera: -30
Evaporation of dams and aquifers: -60
Renewable total: 860
TRANSFER RESOURCES:
First phase ATS: 600
Losses: -60
TOTAL EXTERNAL: 540
TOTAL AVAILABLE RENEWABLE: 1.500
RE-USE OF RESOURCES: 100
RESERVATIONS: 210
OTHER (Backish water): 35
o Overexploited aquifers
o Irrigated package
| Key actions | Millions of pesetas |
|---|---|
| Reform and modernization of irrigation | |
| Primary network | 61.182 |
| Secundary network | 120.220 |
| Post-transfer Tajo-Segura | |
| Irrigated areas | 14.532 |
| Infrastructure improvement and replacement | 7.930 |
| System management | |
| Improved regulation and distribution | 27.771 |
| Infrastructure exploitation of aquifers in drought period | 2.262 |
Key actions:
- Flood control
- Ramblas conditioning
- Defenses and channeling
- Rio Segura better targeted
Invest (Millions of pesetas
- Andalucía: 389
- Castilla-La Mancha: 4.600
- Región de Murcia: 43.000
- Comunidad Valenciana: 5.192
- State: 39.054
- Total: 92.235
Typology
- Rice: 1
- Crypto-wetlands: 12
- Freshwater pond: 28
- Salted pond: 4
- Dams or weirs: 23
- Coastal wetlands: 17
- Lagoons: 25
- Interior salt marshes : 8
| Jumps | Power Kw | Efficiency Gwh | Amount (millions of pesetas) |
|---|---|---|---|
| 1. Fuensanta | 5.000 | 17 | 600 |
| 2. Cenajo(*) | 5.000 | 33 | 1.400 |
| 3. Fontanar | 52.000 | 100 | 6.500 |
| 4. Talave-Cenajo | 11.000 | 66 | 2.200 |
(*)Regardless Talave-Cenajo connection
| Features | Quality group limits | ||
|---|---|---|---|
| First | Second | Third | |
| pH | 6,5-7,5 | 6.0-8.5 | 5.5-9.0 |
| Suspended solids(mg/l) | <30 | <70 | <120 |
| Settleable materials (ml/l) | <0.5 | <1 | <1 |
| DBO5 (mg/l) | <15 | <30 | <60 |
| DQO (mg/l) | <80 | <120 | <300 |
| Dissolved oxygen (mg/l) | <5 | >3 | >1 |
| Detergents (mg/l de lauril sulfato) | <2 | >3 | <6 |
| Manganese (mg/l) | <0.05 | <0.4 | <0.4 |
| Mercury(mg/l) | negativo | negativo | negativo |
| Lead (mg/l) | <0.10 | <0.5 | <0.5 |
| Selenium(mg/l) | <0.05 | <0.4 | <0.4 |
| Cyanides (mg/l de Cn-) | <0.01 | <0.1 | <0.1 |
| Chlorides (mg/l de Cl-) | <250 | <400 | <700 |
| Sulfates (mg/l de SO4 -2) | <200 | <400 | <800 |
| Sulfides (mg/l) | <1 | <1 | <2 |
| Sulfites (mg/l) | <1 | <1 | <2 |
| Fluorides (mg/l de F-) | <1.5 | <10 | <10 |
| Total phosphorus (mg/l de P2O5) | <5 | <10 | <20 |
| Ammonia(mg/l de NH +4) | <0.5 | <1 | <1 |
| Nitrites (mg/l de NO -2) | <50 | <100 | <150 |
| Nitrates (mg/l de NO -3) | <100 | <200 | <300 |
| Oils / fats no persistent(mg/l) | negativo | indicios | indicios |
| Phenols (mg/l de C6 O14 H6) | <0.001 | <0.002 | <0.05 |
| Aldehydes (mg/l) | <1 | <1 | <2 |
| List I substances | exentas | exentas | exentas |
| Pesticides (mg/l) | <0.05 | <0.05 | <0.05 |
- Accompanying Programs
- Investment by objectives
- Investment by financial agents
- Regulations I
- Regulations II
The various actions contemplated in the Segura Water Plan are included in the following programs Accompaniment:
Water Control and Public Consumption Regulations Sec
Control and Water Use Regulations Sec Recreativo
Promoting social use of reservoirs
Retrieve. and ordenac. margins and banks
Demarcation of D.P.H. and areas of police
Plans Hidrológ.-Forest and preserves. soil
Delineation of flood zones
INFRASTRUCTURE. and Syst. Management forecasting and flood defense
Improvement, modernization and consolidation of irrigation
Hydroelectric Development
Eutrophication of water bodies
Determination of environmental flow
Identification of sensitive areas
Improvement of hydrological knowledge
Supplies., Desalination, wastewater treatment and reuse
Control Networks
underground water
Dam safety
Monitoring and Control Plan
According to the purposes to be achieved, different actions are subsumed under the following objectives:
Increased water resources
Drainage and water treatment
Flood Defence
Improvements and environmental protection
Improved irrigation
Hydroelectric equipment state infrastructure
Control networks and other inland waters
Research and development
Replacement and maintenance
| Objetives | Percentage distribution (%) | ||||
|---|---|---|---|---|---|
| Amount | Central Administration | Autonomic Administration | Local Administration | Total | |
| Total | 495.343 | 56 | 41.4 | 2.6 | 100 |
| Increased water resources | 31.859 | 6.4 | 0 | 0 | 6.4 |
| Drainage and water treatment | 92.235 | 7.9 | 10.7 | 0 | 18.6 |
| Flood Defence | 65.623 | 13.3 | 0 | 0 | 13.3 |
| Improvement and environmental protection | 65.895 | 7.9 | 2.8 | 2.6 | 13.3 |
| Improved irrigation | 195.934 | 11.7 | 27.9 | 0 | 39.6 |
| Hydropower equipment | 12.300 | 2.5 | 0 | 0 | 2.5 |
| Control Networks | 15.532 | 3.1 | 0 | 0 | 3.1 |
| Research and development | 8.035 | 1.6 | 0 | 0 | 1.6 |
| Replacement and maintenance | 7.930 | 1.6 | 0 | 0 | 1.6 |
Investment by finantial agents
| Agents | Amount | (%) |
|---|---|---|
| Total | 495.343 | 100 |
| Central Administration | 277.271 | 56 |
| Autonomic administration | 204.929 | 41.4 |
| Murcia | 121.487 | 24.5 |
| C.A. Valenciana | 55.334 | 11.2 |
| C.A. Castilla - La Mancha | 27.415 | 5.6 |
| C.A. Andaluza | 692 | 0.1 |
| Local Administration | 13.144 | 2.6 |
Criteria for Priority Uses:
- Supply of populations, including small industries connected to the grid
- Irrigation and agricultural uses
- Industrial uses other than electricity production
- Industrial uses for electricity production
- Acuiculture
- Recreation
- Other uses
Demands and guarantees
To satisfy the demands, the guarantee to be provided by the operating system will be based on the concept of accumulated deficits, adopting as standares values:
- Supplying: 10, 16 y 30%.
- Irrigated lands: 50, 75 and 100% of annual demands set by the sum of deficits in one, two and ten consecutive years respectively.
- Package:
- Urban demand. Not be accepted in the long term value of losses in the networks of over 2% or gross appropriations in liters / capita day, greater than:
Permanent population Upper Medium Low Less than 10,000 280 250 220 10,000 to 50,000 310 280 250 from 50,000 to 250,000 360 330 300 More than 250.000 410 380 350 - Agricultural demand. Not be accepted in the long term, the effects of the Water Planning unit gross values of strength, in m³ / ha. year, exceed:
Field Crops 6.300 Forage crops 12.200 Horticulture 5.000 Woody crops 8.300
- Urban demand. Not be accepted in the long term value of losses in the networks of over 2% or gross appropriations in liters / capita day, greater than:
Flow rates and volumes required for environmental reasons:
Establishes the goal of sustaining a minimum flow to certain environmental and health effects of 4 m3/sec., Circulating from Contraparada (Murcia) to San Antonio Dam (Guardamar).
This flow may be derived from previous uses returns as inputs or desembalsando specifically programmed for this purpose.
For the upper reaches and tributaries of the Segura generally set a minimum flow in permanent channels, equivalent to 10% of the average annual contribution in natural regime. (Unless otherwise justified).Allocation and reservation of the resources available to today's demands:
Is withheld for the state of any possible appeal not assigned according to the provisions of RD Law 3 / 86 to December 30.
If so enables P.H. National will tend to improve environmental minimum flows to subsequently eliminate overexploitation of aquifers and be balanced to meet the remaining deficit.
Will proceed to grant all concessions linked to the first phase of the Tajo-Segura, in the areas of activity covered by the Law 52/80.On concessions and review:
Exceptions justified given the situation of water shortage in the basin will not be awarded concessions for new uses in that it does not prove the availability of renewable resources for their care.
Generally not be granted concessions of groundwater with the possible exception of the high seats, depressed areas or aquifers in which new concessions can not significantly affect the rest of the operating system of the basin. These concessions must obey the exceptional social interest and its granting is not required to provide significant conditions to third parties.
The review of the granting concessional flows to adapt its actual needs will be evaluated based on the provisions in the Plan, the flow actually derived and the characteristics of the existing infrastructure.
From the date of approval of the Plan shall update the inventory of all existing exploitation in order to know the actual characteristics of them and their administrative proceeding generally to the installation of meters or other measuring instrument . This facility will be mandatory for supplies and industrial uses and in other cases when the volume is over 100,000 m3/year.