18-Geol-A2 Hydrogeology
Worked solutions to 8 past sittings (2014–2019), 41 questions. Pick a sitting, or start from a topic below.
Topics across the sittings
Topics that come up in more than one sitting, taken from the headings of our worked solutions. A topic counts once per sitting.
- Anisotropic Darcy Velocity (3 sittings): December 2019 Q1 · December 2018 Q1 · May 2018 Q1
- Falling-Head Permeameter (3 sittings): December 2018 Q1 · May 2018 Q1 · May 2017 Q1
- Slug Tests (3 sittings): December 2018 Q5 · May 2018 Q5 · May 2017 Q2
- Vertical Flow (3 sittings): December 2018 Q2 · May 2018 Q2 · May 2017 Q2
- Areal Recharge (2 sittings): December 2018 Q4 · May 2018 Q4
- Bouwer-Rice (2 sittings): December 2018 Q5 · May 2018 Q5
- Cooper-Bredehoeft-Papadopulos (2 sittings): December 2018 Q5 · May 2018 Q5
- Core-Sample Soil Phase Relations (2 sittings): December 2018 Q1 · May 2018 Q1
- Effective Conductivities (2 sittings): December 2018 Q2 · May 2018 Q2
- Exploration Methods (2 sittings): December 2018 Q3 · May 2018 Q3
- Layered Confined System (2 sittings): December 2018 Q2 · May 2018 Q2
- Leaky (2 sittings): May 2017 Q5 · December 2016 Q4
- Leaky-Aquitard Response (2 sittings): December 2018 Q3 · May 2018 Q3
- Method Comparison (2 sittings): December 2018 Q5 · May 2018 Q5
- Regional Discharge (2 sittings): December 2018 Q2 · May 2018 Q2
Questions by sitting
December 2019
- Question 1: Anisotropic Darcy Velocity, Three-Well Hydraulic Gradient, and Soil Phase Relations
- Question 2: Layered Vertical-Flow Pressures, Density-Dependent Flow Direction Across an Aquitard, and Confined Storage Volume
- Question 3: Theis and Hantush-Jacob Leaky Drawdown, and a Regional-Gradient Aquifer-Sufficiency Check
- Question 4: Layered Landfill-Cap Seepage, Engineered Hydraulic Containment, and Slug/Time-Drawdown Aquifer Tests
- Question 5: Storativity vs. Specific Yield, Comparative Drawdown Behaviour, Saltwater Encroachment, and Aquifer-Investigation Design
December 2018
- Question 1: Core-Sample Soil Phase Relations, Anisotropic Darcy Velocity, and Falling-Head Permeameter
- Question 2: Layered Confined System — Effective Conductivities, Vertical Flow, and Regional Discharge
- Question 3: Confined-Aquifer Drawdown Near a Recharge Boundary, Leaky-Aquitard Response, and Exploration Methods
- Question 4: Step-Rate Pump Test Superposition, Two-Well Unconfined Flow, and Areal Recharge
- Question 5: Slug Tests — Method Comparison, Bouwer-Rice (Unconfined), and Cooper-Bredehoeft-Papadopulos (Confined)
May 2018
- Question 1: Core-Sample Soil Phase Relations, Anisotropic Darcy Velocity, and Falling-Head Permeameter
- Question 2: Layered Confined System — Effective Conductivities, Vertical Flow, and Regional Discharge
- Question 3: Confined-Aquifer Drawdown Near a Recharge Boundary, Leaky-Aquitard Response, and Exploration Methods
- Question 4: Step-Rate Pump Test Superposition, Two-Well Unconfined Flow, and Areal Recharge
- Question 5: Slug Tests — Method Comparison, Bouwer-Rice (Unconfined), and Cooper-Bredehoeft-Papadopulos (Confined)
December 2017
- Question 1: Confined-Aquifer Storage, Three-Point Hydraulic Gradient, and Density-Driven Flow Across an Aquitard
- Question 2: Vertical Flow Through an Intact and a Fractured Clay Aquitard, and a Two-Layer Anisotropy Test
- Question 3: Drawdown-Curve Diagnostics, Cooper-Jacob Analysis, and Superposition for Two Wells with Different Pumping Schedules
- Question 4: Steady Radial Flow to a Well — Confined and Unconfined Thiem Analysis, and a Leaky-Aquifer Drawdown
- Question 5: Unconfined Dupuit-Forchheimer Flow With and Without Areal Recharge, and a Confined-Aquifer Slug Test
May 2017
- Question 1: Falling-Head Permeameter, Storage Properties and Soil Phase Relations
- Question 2: Layered Confined Aquifer, Vertical Flow, and a Density-Driven Interface and Slug Test
- Question 3: Regional Confined Discharge and Dupuit-Forchheimer Flow with Recharge
- Question 4: Transient Drawdown Near a Straight-Line Boundary, and Unconfined Thiem Hydraulics
- Question 5: Leaky and Non-Leaky Confined Aquifer Transient Drawdown
December 2016
- Question 1: Darcy Velocity, Seepage Velocity, Permeameter K, and Storage Changes
- Question 2: Flow Net Through an Earthen Dam
- Question 3: Vertical Flow Through Three Layered Formations
- Question 4: Well Drawdown in a Confined Aquifer — Fully Confined vs. Leaky
- Question 5: Groundwater Exploration Methods, K-Determination Methods, and Slug vs. Pump Tests
December 2015
- Question 1: Concept True/False, Soil Density, Storage Volumes and Two Gradient Problems
- Question 2: Layered-Aquitard Darcy Velocity Under Fresh Water and Brine
- Question 3: Unconfined Flow Between Two Wells — Dupuit-Forchheimer With and Without Recharge
- Question 4: Confined-Aquifer Drawdown — Theis, then a Leaky Aquitard (Hantush-Jacob)
- Question 5: Transient Drawdown Near a River (Constant-Head) and Near an Impermeable Boundary
May 2014
- Question 1: Unconfined Transmissivity, Soil Index Properties and a Landfill Aquitard
- Question 2: Layered Aquitard Conductivities and a Density-Driven Flow Direction
- Question 3: Confined-Aquifer Water Supply and a Three-Point Flow-Net Problem
- Question 4: Unconfined Well Hydraulics and Seepage Through an Earthen Dam
- Question 5: Transient Drawdown — Stepped Pumping, a River Boundary and a Leaky Aquitard
- Question 6: Storage, Boundary Effects, Velocity Measurement and Field Test Selection