B.F. Bachelor of Forestry Forest Hydrology and Watershed Management 2 — Questions and Answers
Question 1: What is 'baseflow' in stream hydrology?
- The maximum flood discharge of a stream
- Sustained streamflow between storm events, supplied by groundwater (Correct answer)
- Water released from a reservoir at a constant rate
- Rainfall-generated surface runoff
Correct answer: Sustained streamflow between storm events, supplied by groundwater
Baseflow is the portion of streamflow contributed by groundwater discharge that sustains streams between precipitation events.
Question 2: What are 'Best Management Practices' (BMPs) in the context of forest hydrology?
- Federal laws regulating timber harvests near streams
- Guidelines designed to minimize nonpoint source pollution from forestry operations (Correct answer)
- Required permits for crossing streams with equipment
- State regulations on minimum buffer strip widths only
Correct answer: Guidelines designed to minimize nonpoint source pollution from forestry operations
BMPs are voluntary or mandatory guidelines developed to minimize the impact of forest management activities on water quality and quantity.
Question 3: Which soil property most strongly controls infiltration rate in a forested watershed?
- Soil color
- Soil texture and structure (Correct answer)
- Soil pH
- Organic matter color
Correct answer: Soil texture and structure
Soil texture and structure determine pore size distribution and connectivity, which directly control the rate at which water infiltrates.
Question 4: What is 'peak flow' in watershed hydrology?
- Average annual streamflow
- The maximum discharge reached during a storm event (Correct answer)
- The flow rate at which a stream supports maximum fish populations
- Snowmelt-generated flow in spring only
Correct answer: The maximum discharge reached during a storm event
Peak flow is the highest discharge rate occurring during a storm or runoff event, influencing flood risk and channel erosion.
Question 5: What is 'snow interception' and why is it important in forest hydrology?
- Snowfall captured by tree canopies that may sublimate or fall as melt, reducing snow reaching the ground (Correct answer)
- Snow removal operations near forest roads
- Measuring snowpack depth in open areas only
- Snowfall that refreezes on streambanks
Correct answer: Snowfall captured by tree canopies that may sublimate or fall as melt, reducing snow reaching the ground
Snow interception is snowfall captured by tree canopies that can sublimate or be released as melt, affecting the amount and timing of water reaching the soil.
Question 6: Which US federal act most directly regulates water quality impacts from forest management on federal lands?
- National Forest Management Act (NFMA)
- Clean Water Act (CWA) (Correct answer)
- Endangered Species Act (ESA)
- Wilderness Act
Correct answer: Clean Water Act (CWA)
The Clean Water Act regulates nonpoint source pollution and requires states to develop programs to control polluted runoff, including from forestry operations.
B.F. Bachelor of Forestry Forest Hydrology and Watershed Management 2
What is 'baseflow' in stream hydrology?