CE 394K.2 Surface Water Hydrology Homework 1: Fluxes, Flows and Volumes
Spring 2005
1. We are working
with the flow data for five streamflow gaging stations as shown below. The 15 min flows for Jan 1 through
2. At a daily time interval, calculate the cumulative volume (acre-ft), incremental volume (acre-ft) and the daily mean discharge (cfs) for each gage for the period of record. 1 acre = 43,560 ft2
3. The USGS area given below is the total drainage area above each gage site and the Sub Area is the incremental drainage area for each of the five subwatersheds draining to to the stream gages. 1 square mile = 640 acres.
Site No |
Name |
USGS Area |
Sub Area |
Wshed |
|
|
(Sq. Miles) |
(Sq. Miles) |
|
8171000 |
|
355 |
355 |
1 |
8171300 |
|
412 |
57 |
2 |
8172400 |
Plum Creek at |
112 |
112 |
3 |
8170500 |
San Marcos R at |
49 |
49 |
4 |
8172000 |
San Marcos R at |
838 |
377 |
5 |
Calculate the runoff in mm/day occurring in each subwatershed for the period of record (i.e. the daily value of runoff coming from the subwatershed into the stream system for each day, Jan 1 through Jan 10).