 # Summary Advanced Hydrological Systems Analysis

##### Course
- Bier
- 2020 - 2021
- Wageningen University (Wageningen University, Wageningen)
- Earth and Environment
244 Flashcards & Notes
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• Modelling - what is the right order?
1. Perceptual mode: deciding on the process
2. Conceptual model: deciding on the eqs
3. Procedural model: get code running on a computer
4. Calibration/SA: identify parameters, estimate uncertainty
5. Evaluation: compare output with observations

Application: scenario analysis
• What are the applied concepts in the unsaturated zone?
• Richards equation: assumes only vertical flow (t and z)
• Use soil properties
• Simulate root water uptake, capillary rise
• Set saturated GW at fixed depth (BC in SWAP)
• Numerics: dz, dt, FV
• What are the applied concepts in the open water?
• Linearised St-Venant const. Drain
• 1D model
• UPDATE
• What are the scales of (un)saturated zone and open water?
Unsaturated zone:
Saturated zone:
Open water;
• What are two main issues?
• How to couple system scales?
• How to come up with a good choice of parameters (bc there are many!), after choosing the master and slaves?
• ## 1.1 Introduction

• What are the applied concepts in the saturated zone (3):
• assume horizontal flow in aquifers (not in MODFLOW)
• vertical flow in aquitards
• recharge = net rainfall (not accounting for storage in unsaturated zone)
• What are the equations and numerics used in the saturated zone (conceptual model)?
Darcy & Dupuit
x, y, layers

Numerics: dx, dy, triangles, dt, FE
• What are the equations in the UNsaturated zone (conceptual model)?
Only in
Richards
bc Hsat
Numerics: dz, dt, FV
• What are the applied concepts in open water (4)?
• Cross-section averaged properties
• Only long waves
• Constant drainage/infiltration
• (pseudo-)stationary flow
• What are the equations in the openw ater (conceptual model)?
Linearised
St-Venant
Const drain

Numerics: L1-LN, dt, FD