X hits on this document

PDF document

Parameter Sensitivity in Hydrologic Modeling - page 12 / 163

342 views

0 shares

0 downloads

0 comments

12 / 163

1.1

BACKGROUND OF GIS USE IN WATER RESOURCES APPLICATIONS

Recently, the use of automated methods in water resources engineering applications has proven to be a viable alternative to more traditional hand calculation methods for many engineering agencies. The Texas Department of Transportation (TxDOT) is one of many agencies interested in using automated methods to aid in the hydrologic parameter development required for highway drainage facility design.

As a large portion of the cost associated with highway projects is attributed to the design and construction of drainage facilities, research has been dedicated to exploring a more economical and time efficient means of design. Geographic Information Systems (GIS) are a means of simplifying this process in that a GIS is capable of computing spatially derived hydrologic parameters such as watershed area, SCS curve number (for runoff and lag time computation), gridded precipitation, flow length, and slope for each watershed in a relatively short time.

1.2

PROJECT HISTORY

This implementation project follows an investigation conducted by

Anderson (2000) for the Texas Department of Transportation (TxDOT). Anderson

implemented GIS-based tools developed by CRWR at two sites in Texas:

Castleman Creek (McClennan County, TX) and Pecan Bayou (Brown County,

TX).

The

methodology

used

in

Anderson’s

investigation

utilized

tools

for

hydrologic analysis and parameter extraction (CRWR-PrePro), terrain data

2

Document info
Document views342
Page views342
Page last viewedSat Dec 03 04:42:36 UTC 2016
Pages163
Paragraphs3546
Words25756

Comments