Title: FE 423 - Watershed Analysis Lecture 1a - Overview
1FE 423 - Watershed AnalysisLecture 1a - Overview
- Finn Krogstad
- UW Forest Engineering
- http//students.washington.edu
2OVERVIEW
- why -
- what -
- when -
- where -
- how -
- who -
3EARLY MANAGEMENT
- Management was done with little consideration of
environmental impacts
4Early Regulations
- Case-by-case evaluation of roads, harvests, and
locations - Still dominates forest management today
5Watershed Analysis
- APPROACH - basin specific
- where are the hazards
- what are they sensitive to
- will they reach the stream
- are there sensitive reaches
- are vulnerable fish there
- do inputs exceed background
6Watershed Analysis
- PROBLEMS
- Massive expert time
- Site-by-site investigation
- Stop being watershed specific
- Site, not landscape plans
- Is plan A worse than plan B?
7Goal Comparing Landscape Options
8OVERVIEW
- why - spatial approach
- what -
- when -
- where -
- how -
- who -
9WATERSHEDS
- Spatial Heterogeneity
- Water Flows Downhill
10EACH POINT HAS UNIQUE
- Vegetation
- Soil
- Slope
- Aspect
- Upslope Area
- Distance to Stream
- Management
11DOWNHILL IMPACTS
- Saturating Hillslopes
- Erosion Runoff Filtering
- Stream Flow Volumes
- Stream Width Depth
- Sediment Supply
- Fish Habitat
12WE NEED
1a. Data for each point in the watershed 1b.
Calculate processes at each point 2a. Sum outputs
from upslope area 2b. Sum delivery costs to
stream
13Spreadsheets - The Most Powerful Scientific Tool
Ever Developed
1. Bring in data 2. Run calculations 3. Display
results Originally was Programming for
Accountants
14GRID the Spreadsheet for Landscapes
1. Bring in spatial data (soils, vegetation,
topography, ) 2. Run equations 3. Display
results ArcView not just pretty pictures
15Watershed Analysis in GRID
- data for each point
- calculation at each point
- along path to the stream
- accumulating upstream inputs
- accumulating different inputs
- compare management plans
16OVERVIEW
- why - spatial approach
- what - downhill in GIS
- when -
- where -
- how -
- who -
17SCHEDULE
18OVERVIEW
- why - spatial approach
- what - downhill in GIS
- when - schedule
- where -
- how -
- who -
19SYLLABUS
OSB
20OVERVIEW
- why - spatial approach
- what - downhill in GIS
- when - schedule
- where - OSB 111
- how -
- who -
21SYLLABUS
- Instructors Finn Krogstad, Peter Schiess
- GradingFE423 three exams (33 each)FE523
three exams and a project (25 each) - Lectures Tuesday Thursday, 930-1120, in OSB
111 (except first day in AND 302) - ExamsEach exam will include an in-class and a
take-home part. The in-class part is open book,
open note, pencil-and-paper discussion of
grid-based solution of watershed problems. The
take-home part which will require solution of
problems. - Practice ProblemsEach lecture will include a
set of problems to provide hands-on experience in
the grid-based approach to solving watershed
problems. These problems are not handed in, but
the exams will look much like these problems, and
will assume that students have completed all
problems.
22READINGS
- Hard copy of the online help Cell Based Modeling
with GRID - People without ArcView experience Getting to
know ArcView GIS - Another view of Spatial Analyst Extending
Arcview GIS - Some Hydrology and Geomorphology Water in
Environmental Planning, Watershed Analysis
Manual (WFPB) Geomorphology (Chorley, et al)
23OVERVIEW
- why - spatial approach
- what - downhill in GIS
- when - schedule
- where - OSB 111
- how - syllabus
- who -
24Why Watershed Analysis in GRID?
- PROBLEMS
- not a survey class an approach, not facts
- learning GIS requires work
- existing software more accurate black boxes
- ADVANTAGES
- quantitative approach actually say something
- insight into process applicable to many issues
- GIS skills applicable to other types of problems
25Should you take this course?
- Spatial Hydrology
- Landscape Scale
- More GIS
26Discussion Problemsfor Thursday, try and be
ready to discuss the following
- Make a spreadsheet that will estimate the peak
flow Q5.157A.9Pa1.35F-.21 for a five year
storm in Region XII, using a table of road
crossings with their respective contributing area
A, percent forest cover F, and annual rainfall
Pa.