Download - Groundwater mining in arid and hyper-arid conditions: some reflections from Africa and South America
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Jorge Molinero
January 2013
Groundwater mining: Some reflections from Africa and South America
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1. Introduction
2. Andean zone
3. Sahara zone
4. Some reflexions
Contents
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Geographic distribution of water resources
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Arid Andean Zone – Hydrogeologic framework
Gali & Dingman (1962) in Magaritz et al. (1990): How to propagate errors along the time…
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Saharian Zone: Hyper-arid
POZO HHT-106
PARÁMETROS HIDROGEOLÓGICOSCOORDENADAS
GEOGRÁFICAS U.T.M.
581777.5969
NIVEL ESTÁTICO (m) 0.50 W 8º 10' 20.6" Y: 3038054.8417
CAUDAL (L/s) 16.67 N 27º 27' 47.5" X:
NIVEL DINÁMICO (m) 8ALTITUD
410
PROFUNDIDAD POZO (m) 160LOCALIDAD
PROFUNDIDAD BOMBA (m) 24 Huerto Hussein Tamek (Enjaila )
ENERGÍA EléctricaLUGARES ABASTECIDOS
Huerto de Enjaila, Escuela de Formación de cuadros
(militar), Escuela de mutilados de guerra y proyeco avícola
ANALÍTICA 2001 y 2004
CORTE GEOLÓGICO
COMENTARIOS CONSTRUCCIÓN
2 bombas: 1 sumergible y una de aspiración.
Supuestamente aquí hay una gran bolsa de
agua. En teoría es para la agricultura pero en el
huerto la beben. Bombea 4 horas por la
mañana (año 2004 11h/día. El nivel estaba a
+1.5 m y no bajaba de -2 m)
1950
GEOLOGÍA
Agr
icu
ltu
reDrinking water supply
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Saharian Zone: Hyper-arid
Mine Dewatering Mineral Processing
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This is an (endorreic) Basin in the “High Cordillera”
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This is the “Pampa” (Hyper-arid valley)
High cordillera
Groundwater discharge
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Groundwater discharge
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Water consumption by mining industry in Chile
500,000.0 ton/y x 2
10 mm 100 Km2 Is that sustainable ?
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Some reflections• Extensive groundwater resources available in hyper-
arid regions.
• Growing population (improving living conditions and development)
• Increasing agriculture (good conditions for high value crops)
• “Boom” of mining activity (steady increase of metals’ price by demand in emerging economy)
• Conflicts (low level) between different users already exist and could be expected to increase
• A need of water management models/doctrines specific for arid an hyper arid environments. Traditional or “modern” water management paradigms are not valid here!
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