QGIS for Hydrological Applications - Second Edition

 Foreword

    About This Book

    1 Preparing Data from Hard Copy Maps

     1.1 Introduction

     1.2 Choosing the Projection

     1.3 Importing the Scanned Map into the Georeferencer

     1.4 Setting the Transformation Parameters

     1.5 Adding Ground Control Points (GCPs)

     1.6 Reduce Errors and Perform the Transformation

     1.7 Verify the Georeferenced Map

     1.8 Digitizing Vector Layers from a Georeferenced Backdrop

     1.9 Styling the Mountains, Rivers, and Lakes

    2 Importing Tabular Data into QGIS

     2.1 Introduction

     2.2 Check the Spreadsheets

     2.3 Import Spreadsheets

     2.4 Convert Spreadsheet to Vector Layer

     2.5 Join Attribute Tables

     2.6 Edit the Joined Attribute Table

     2.7 Interpolate Point Features to Raster

     2.8 Styling the Results

    3 Spatial Analysis with Map Algebra

     3.1 Introduction

     3.2 Preparation

     3.3 Condition 1: Wells within 150 Meters of Houses or Roads

     3.4 Condition 2: No Industry, Mine, or Landfill within 300 m from Wells

     3.5 Condition 3: Wells Less than 40 Meters Deep

     3.6 Combine the Three Conditions and Report the Results

    4 Stream and Catchment Delineation

     4.1 Introduction

     4.2 Download DEM Tiles

     4.3 Mosaic DEM Tiles

     4.4 Reproject DEM

     4.5 Create a Subset of the DEM

     4.6 Fill Sinks and Calculate Flow Direction

     4.7 Delineate Streams

     4.8 Define Outflow Point

     4.9 Delineate the Catchment

     4.10 Clipping Layers to the Catchment Boundary

     4.11 Styling the Resulting Catchment Area

     4.12 Storing the Data in a GeoPackage

    5 Adding Open Data to Your Catchment

     5.1 Introduction

     5.2 Adding Data from OGC Web Map Services

     5.3 Adding Vector Data from OpenStreetMap

    6 Calculating Percentage of Land Cover per Subcatchment

     6.1 Introduction

     6.2 Preparing the Subcatchment Layer

     6.3 Preparing the Land Cover Data

     6.4 Intersect the Land Cover Layer with the Subcatchment Layer

     6.5 Calculate Land Cover Class Area per Subcatchment

     6.6 Create Pie Charts Using the Data Plotly Plugin

    7 Map Design

     7.1 Introduction

     7.2 Map Design Considerations - Adding More Data

     7.3 Styling and Labeling Cities and Towns

...more

    Index

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