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GIS in Water Resources: Lecture 1

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- In-class and distance learning
- Land and water interaction
- Geospatial database of hydrologic features
- Curved earth and a flat map

- In-class and distance learning
- Geospatial database of hydrologic features
- Arc Hydro data model
- Curved earth and a flat map

Lectures

Powerpoint slides

Video streaming

Readings

“Modeling our World”

Narratives written around slides

Homework

Term Project

Oral presentation

HTML report

Class Interaction

Chat room

Examinations

Midterm, final

Instructor-Centered Presentation

Community-Centered Presentation

Instructor

Student

Traditional Classroom

Community

Inside and Outside

The Classroom

Utah State University

Dr David Tarboton – terrain analysis with digital elevation models

Dr Tarboton will present lectures on Oct 8-10

- In-class and distance learning
- Geospatial database of hydrologic features
- Arc Hydro data model
- Curved earth and a flat map

Relational Linkages

Spatial Attributes

Water Right

Locations

Descriptive Attributes

Vector data are defined spatially:

(x1,y1)

Point - a pair of x and y coordinates

vertex

Line - a sequence of points

Node

Polygon - a closed set of lines

Raster data are described by a cell grid, one value per cell

Vector

Raster

Point

Line

Zone of cells

Polygon

Digital Elevation

Models

Streams

Watersheds

Waterbodies

- In-class and distance learning
- Geospatial database of hydrologic features
- Arc Hydro data model
- Curved earth and a flat map

- An data infrastructure for storing and integrating hydro data within ArcGIS
- A set of hydro objects built on top of ArcObjects
- A set of standardized attributes
- A vocabulary for describing data (glossary)
- A toolset for implementing the data model

Drainage System

Hydro Network

Flow

Time

Time Series

Hydrography

Channel System

Arc Hydro Components

Hydrology

Hydrography

Data Model

Based on

Inventory

Streams

Drainage Areas

Hydrography

Channels

Terrain Surfaces

Rainfall Response

Digital Orthophotos

Follow a drop of water from where it falls on the land, to the stream, and all the way to the ocean.

Relationships between

objects linked by tracing path

of water movement

Arc Hydro Framework dataset for USA at 1:500,000 scale

Built from USGS and National Weather Service data

MonitoringPoints are USGS stream gaging stations

Building

lot

Arc Hydro

Applied

to an Urban

Subdivision

Storm

sewer

Grassy

swale

Arc Hydro Framework Input Data

Watersheds

Waterbody

Streams

Monitoring Points

Arc Hydro Framework

Hydrologic Unit Code

= 12100203

Guadalupe Basin

(4 HUC’s)

- 2015 HUC’s cover continental US
- average area ~ 1 county

Arc Hydro Framework Dataset for the Guadalupe Basin

HydroNetwork through Canyon Lake

Flowlines through water body

Generic Junction

(for topological connection of edges)

HydroJunction has Waterbody Relationship

- In-class and distance learning
- Geospatial database of hydrologic features
- Arc Hydro data model
- Curved earth and a flat map

Equator

(0,0)

Prime Meridian

Longitude line (Meridian)

N

W

E

S

Range: 180ºW - 0º - 180ºE

Latitude line (Parallel)

N

W

E

S

(0ºN, 0ºE)

Equator, Prime Meridian

Range: 90ºS - 0º - 90ºN

Austin:

(30°N, 98°W)

Logan:

(42°N, 112°W)

60 N

30 N

60 W

120 W

90 W

0 N

Flat Map

Cartesian coordinates: x,y

(Easting & Northing)

Curved Earth

Geographic coordinates: f, l

(Latitude & Longitude)

Representative Fraction

Globe distanceEarth distance

=

Map Projection:

Map Scale:

Scale Factor

Map distanceGlobe distance

=

(e.g. 0.9996)

(e.g. 1:24,000)

A planar coordinate system is defined by a pair

of orthogonal (x,y) axes drawn through an origin

Y

X

Origin

(xo,yo)

(fo,lo)