Summary: Advanced Hydrological Systems Analysis
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1 Week 1
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Modelling  what is the right order?
 Perceptual mode: deciding on the process
 Conceptual model: deciding on the eqs
 Procedural model: get code running on a computer
 Calibration/SA: identify parameters, estimate uncertainty
 Evaluation: compare output with observations
Application: scenario analysis  Perceptual mode: deciding on the process

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 StVenant 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?
 How to couple system scales?

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
bcHsat
Numerics: dz, dt, FV 
What are the applied concepts in open water (4)?
 Crosssection averaged properties
 Only long waves
 Constant drainage/infiltration
 (pseudo)stationary flow
 Crosssection averaged properties

What are the equations in the openw ater (conceptual model)?
Linearised
StVenant
Const drain
Numerics: L1LN, dt, FD
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