WASH Cluster – Emergency Training GWD GWD3 1 1 Groundwater Development and Drilling Session 3 Identifying Potential Groundwater Sources

WASH Cluster – Emergency Training GWD GWD3 2 Provide an understanding of: –information required to identify a groundwater source –how to go about obtaining that information Point out the critical importance of obtaining as much relevant information as possible before landing in the middle of potential chaos Session Aims 2

WASH Cluster – Emergency Training GWD GWD3 3 Groundwater source may not be available in the immediate vicinity of a site (eg IDP or refugee camp). Installing a well does not guarantee an adequate supply of water to the displaced beneficiaries –constraints on the supply could be either volume or quality What to be aware of 3

WASH Cluster – Emergency Training GWD GWD3 4 EXERCISE 1: ISSUES TO BE CONSIDERED WHEN LOOKING FOR A GROUNDWATER SOURCE GROUPS to PREPARE A LIST DISCUSS AND MAKE CONSOLIDATED LIST Where to start 4

WASH Cluster – Emergency Training GWD GWD3 5 KEY FACTS TO BE KNOWN: Likely volume needed and duration –E.g: For 20,000 (Sphere) –300,000 L/day –Therefore a large reliable resource is required Assessment of the Problem 5

WASH Cluster – Emergency Training GWD GWD3 6 EXERCISE 2: SEARCHING INFORMATION SOURCES In Groups –prepare a checklist of required information, where to find information, Groups to compare lists and come up with a comprehensive list of who, what, where and how the information will assist identifying a groundwater source in an emergency. Potential Data Sources 6

WASH Cluster – Emergency Training GWD GWD3 7 Topography and Rainfall basics 7

WASH Cluster – Emergency Training GWD GWD3 8 Geological map of Ethiopia 8

WASH Cluster – Emergency Training GWD GWD3 9 Hydrogeological map of Ethiopia 9

WASH Cluster – Emergency Training GWD GWD3 10

WASH Cluster – Emergency Training GWD GWD3 11 –Depth to water table, presence of aquifers, yield –Geological mapping, geophysics, drilling information, –Groundwater quality –Local water supplies that may be disrupted by an emergency supply at high volumes –Government regulations / standards Data collection outcomes 11

WASH Cluster – Emergency Training GWD GWD3 12 Case Study 1: Siting a well – 12

WASH Cluster – Emergency Training GWD GWD3 13 Where to investigate 13 EXERCISE 3: SELECTING A TARGET AREA USING AVAILABLE DATA