Asenjo, Janine Trisha F.
GROUP 1
BSCE 3A
TTh 2:30-3:30 PM
CE 3107
Activity No. 1: Hyetographs and Cumulative Precipitation
The table below is a record of precipitation from a recording gage for a storm, for the period
between midnight and 11:15 a.m. on the same day in increments of 0.25 hr. For the data given,
develop the rainfall hyetographs and mass curves. Find the maximum-intensity rainfall for the
gage in in./hr. Use Microsoft Excel in generating the graphs.
GAGE RAINFALL INTENSITY GRAPH
GAGE RAINFALL INTENSITY
3.5
Rainfall Intensity (in/hr)
3
2.5
2
1.5
1
0.5
0
0.25
0.5
0.75
1
1.25
1.5
1.75
2
2.25
2.5
2.75
3
3.25
3.5
3.75
4
4.25
4.5
4.75
5
5.25
5.5
5.75
6
6.25
6.5
6.75
7
7.25
7.5
7.75
8
8.25
8.5
8.75
9
9.25
9.5
9.75
10
10.25
10.5
10.75
11
11.25
0
Time (hr)
TOTAL GAGE RAINFALL
TOTAL GAGE RAINFALL
7
6
RAINFALL (in)
5
4
3
2
1
0
TIME (hr)
Find the maximum-intensity rainfall for the gage in in./hr.
The maximum intensity rainfall on the graph that has a 3.1 inches rainfall falls in the 4th hour.