Summary: Advanced Hydrological Systems Analysis

Read the summary and the most important questions on Advanced Hydrological Systems Analysis

• 1 Week 1

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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

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• 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