Geotechnical and Geoenvironmental Engineering
WATER WELLS, DRAINAGE AND DEWATERING
Description
Theory/Practice
4
Instructors
Maria José Afonso
Contents
WATER WELLS
1. Introduction. Wells and boreholes. Groundwater occurrence. Aquifers and confining layers. Porosity and aquifer storage. Groundwater flow.
2. Well and borehole testing. Objectives, planning, and types of pumping tests.
3. Groundwater investigations for locating well sites.
4. An introduction to well and borehole design.
5. Formation sampling and identification.
DRAINAGE AND DEWATERING
1. Introduction. The importance of drainage and dewatering actions in society
2. Drainage and dewatering in excavations. Techniques and methods in construction sites.
3. In situ permeability tests. Lugeon and Lefranc tests.
4. Dewatering of water table. Dewatering techniques, design, and calculation.
5. Drainage. Drainage techniques, design, and calculation.
Learning Outcomes
Students should know and understand the current methods of implementation and exploitation of groundwater resources; the facilities and drainage techniques of surface and groundwater in geotechnical works; dewatering processes applied in the execution of dry excavations. Select the most appropriate techniques in the mentioned fields. To have a general knowledge for the selection of equipment. Analyze and solve simple problems of applying techniques to these fields.
According to a proposed case study of water well, a drainage system, and a dewatering system, analyze the available data and interpret them. Considering a specific problem, equating methods, techniques, and the more appropriate equipment, with the ability to scale the simplest current systems. Prepare reports to convey the information available in engineering works and propose possible solutions.