Hydrological models and integration of models

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Hydrological models and integration of models
Nico Pieterse Netherlands Institute for Spatial
Research The Hague

• Ronald Dubbeldam
• Grontmij Consulting Engineers
• Houten

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Program

• Program
• 1st hour Hydrological models
• 2nd hour Integration of models

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Hydrological models

• Objective
• Hydrological modeling, theoretical background and
  daily practice
• Boundary conditions time, level of detail
• In relation to your case study Integrated
  Natural Resources Policy Plan

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Hydrological models

• Introduction to modeling
• What is hydrology?
• Types of models
• Comparison of models
• Activities in modeling / cost
• Case study

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Introduction

• Three main classes
• physical
• analogue
• mathematical

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Introduction
System characteristics parameters
Mathematical equations
Output variables
Input variables
Initial and boundary conditions
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Introduction

• Mathematical models
• deterministic (all variables free from random
  variations, based on physical relations), versus
• stochastic (any of the variables is random, with
  distributions of probability)
• (stochastic is a more general term than
  statistical to describe space and time
  dependency)

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Introduction

• Mathematical models
• lumped (no spatial distribution), versus
• distributed (specified regions in space)

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Introduction

• Mathematical models, summarizing

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What is hydrology?

• Definition
• The science of water, its physical and chemical
  properties, phenomena, and distribution over the
  earth's surface

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What is hydrology?
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Types of models

• Types of hydrological models
• Groundwater models Modflow, MicroFem / Triwaco,
  Simgro
• Surface water models Duflow, Sobek, MIKE, ISIS
  (for hydraulic calculations)
• Geochemistry / hydrochemistry Phreeqc
• Contaminant transport models MT3D, RT3D

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Why modelling?

• Integrated Natural Resources Policy Plan
• Is there a need to make a hydrological model? And
  / or does the client want you to?
• Which hydrological processes do you want to
  model? Groundwater, surface water, geochemistry /
  hydrochemistry, etc.

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Activities in modeling
Define purpose
Conceptualization
Field data
Code selection
Model design
Field data
Sensitivity analysis
Calibration
Comparison with field data
Model verification
Sensitivity analysis
Simulation
Presentation of results
Evaluation
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Time and money

• Activities
• Making the offer 10
• Inventory of data (GIS), visiting the project
  area, literature 10
• Model construction 30
• Calibration 30
• Calculation of scenario 10
• Presentation of results 5
• Price range between 10.000 - 30.000

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Case study

• Environmental Impact Assessment
• (EIA, Dutch MER)
• VPC-2,
• (VPC Additional Production Capacity)

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Case study MER VPC-2

• Problem Need for drinking water in the
  province of Utrecht (5.5 million m3/y)
• Client Hydron (drinking water company)
• Solution Find two locations for new well
  fields / pumping stations
• Activities Groundwater modeling in relation
  to ecology, agriculture, archeology,
  contaminants etc.

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Case study MER VPC-2

• Parties involved Drinking water company,
  Province, Water Board
• Project team Projectleader
• Hydrologist (2)
• Ecologist (2)
• Archeologist
• GIS specialist
• Time period 2 years

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Case study MER VPC-2

• Ecological effect analysis for 4 aspects
• areas with a certain conservation status
• legally protected species
• terrestrial vegetation
• aquatic vegetation
• What is important?
• Bird directive
• Habitat directive
• Nature Conservation Law
• Provincial Ecological Structure (UNAT Utrecht
  nature target type)

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Case study MER VPC-2
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Case study MER VPC-2
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Case study MER VPC-2
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Case study MER VPC-2