Test 1
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Seneca College *
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HDG
Subject
Geography
Date
Feb 20, 2024
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HDG451-NAA_Environmental Hydrology Test 1: Total ques�ons: 8
Total points: 47 Dura�on: 120 min Due: February 6, 2024 Que # 1_Short answer (4 pt) What is the minimum volume of water required for the fish ladder below, if each step in the ladder is 0.5m deep, and 1.0m X 0.75m in area; and the turning pool is 1.0m by 2.0m? Volume = Area x Depth
V = 0.5 x 0.75
V = 0.375
V=Area x length V= 0.375 x 2
V=0.75 m
Que # 2_File response (14 pt) a.
Plot the hyetograph and the mass diagram for the precipitation data given below.
(4 pt)
b.
This represented a flood rainfall event. You have been called to a meeting to present
both graphs, briefly explain the data represented on both graphs highlighting the
differences, timing, and peak (no more that ½ page). (10 pt)
Time (hr) Precip
ita�on
(mm) 0.00 0.0 0.25 1.6 0.50 9.2 0.75 8.6 1.00 7.5 1.25 8.1 1.50 8.9 1.75 5.1 2.00 3.6 2.25 1.5 2.75 1.0 3.00 0.5
Que # 3_Short answer (4 pt) Your consul�ng firm is inves�ga�ng brook trout habitat in the upper reaches of the Credit Valley Creek. Iden�fy what you would inves�gate from a hydrologic perspec�ve, and from a hydraulic perspec�ve. Iden�fy at least 4 parameters for each. Hydrologic Perspective The temperature of the water
Water Quality
Volume and Velocity of the habitat (stream)
Surface Runoff Hydraulic Perspective
In stream barriers (culvert etc)
The habitats shape and size Different types of substrate Water Velocity
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Que # 4_File response (5 pt) a) 3 hour, 5 yr = 3mm/hr
b) 14 hr, 10 yr = 3. 75 mm/ hr
c) 40 m, 100yr= 4.5 mm/hr The 3 hr 5 yr has the potential for quick overland flow because its shorter and more intense
Que # 5_Fill in tables (6 pt) Complete the tables and calculate the average precipita�on for the watershed using
: a) the Theissen polygon and b) Isohyetal methods
. a)
Area Area, (ha) Precipitation Average, (mm) Weighted Precipitation, (mm) I
0.32 II
0.07 III
0.30 IV
0.09 V 0.14 VI
0.08
b)
Que # 6_File response (6 pt) Trace the watershed basin divide iden�fying the watershed area that contributes rainfall runoff to the point of analysis marked with a star on the North end of the map. Iden�fy at least 1 (one) saddle forma�on.
(Please see next page).
Area Area, (ha) Precipitation average, (mm)
Weighted Precipitation, (mm)
I
0.20 II
0.34 III
0.19 IV
0.10 V 0.08 VI
0.09 x 125 x 135
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Que # 7_Short answer (4 pt) The diagram below shows a model of the water cycle with arrows showing the movement of water molecules through the water cycle. The circled numbers represent the processes that occur as the molecule reach the different stages of the water cycle. Identifying the name of the water cycle process occurring at each number. (In your answer, please indicate the number and process). Saddle
Que # 8
_Short answer (4 pt) a) In your own words, explain the difference between an element and a process in the hydrological cycle? (2 pt). b) In general, describe how the slope of a watercourse changes from the headwater reaches to the outlet? (2 pt). Type text here
1. Evaporation - 2. Transpiration 3 condesation 4. precipitation 5. run off 6. infiltration
a) evaportation occurs from bodies of water and transpiration occurs through plants
b) the slope decreases as it reaches the outlet