San Francisco State University

EARTH 330

Iclicker Quiz Exam II

Iclicker Quiz; Day 13

1)The reading for today was about nitrate contamination of:

2. The main sources of nitrate pollution are:
3. Irrigated cropland is responsible for what percent of nitrate pollution?
4. Nitrate contamination of groundwater is a long-term problem because:

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Iclicker Quiz; Day 14

1. In hydrology, the term “subsidence” refers to:.
2. Land surface subsidence is never faster than:
3. Is subsidence due to groundwater pumping reversible?
4. Are aquifers affected by land surface subsidence?

iClicker Quiz Day 14

1. What is the term for the percentage of empty space in sediment or rock that can store water?
2. What is the term for measure of how connected the pore spaces are. It measures how easily fluids can flow through the sediments or rock?
3. When groundwater is removed from an aquifer, sediments can settle or compress. This process leads to what?
4. Groundwater and surface water are separate and do not interact?
5. What are potential inputs?
6. Which are potential outputs?
7. What might represent change in storage in the groundwater balance?
8. Which aquifers are pumped the most?
9. ____________ Number 1 Pumped aquifer, dominantly used for Irrigation = 97%
10. ______________heavily pumped aquifer, dominantly used for Irrigation 91%
11. ___________Number 4, most heavily pumped water dominantly for Irrigation 81%, Public Supply 18%, Self Supplied industrial 1%

iClicker Quiz, Day 15

1. Groundwater balance. Which of these is a correct set of INPUTS

1. Rainfall recharge + Evaporation
2. Exchange with influent stream + Irrigation Pumping
3. Evaporation + Irrigation Pumping + Spring flow
4. Snowmelt recharge + Exchange with effluent stream
5. Rainfall recharge + Exchange with influent stream

2. Groundwater balance Which of these is a correct set of OUTPUTS

1. Rainfall recharge + Evaporation
2. Exchange with influent stream + Irrigation Pumping c) Evaporation + Irrigation Pumping + Spring flow

4. Snowmelt recharge + Exchange with effluent stream
5. Rainfall recharge + Exchange with influent stream

3. Groundwater balance Which of these is the best measure of Change in (Aquifer) Storage

1. Rate of outflow from springs
2. Rate of inflow from effluent streams
3. Change in height of water table
4. Change in nitrate concentration in pumped water
5. Change in water level in rivers or lakes

Iclicker Quiz, Day 17

1. According to the article, the times of highest temperatures in California are associated with:

1. “Santa Ana Winds” that blow from the desert in Nevada and Arizona
2. Ridges of high pressure that block cool ocean winds coming from the west
3. Troughs of low pressure that bring dry air from the Canadian high plains to the north
4. “Sonoran Nights” that bring hot air from the desert in Northern Mexico
5. None of the above

2. Scientists call the high pressure pattern blocking storms from reaching California:

1. The “Oddly Stable Ridge” (OSR)
2. The “Quasi-Permanent High-Pressure Anomaly” (QPHPA)
3. The “Ridiculously Resilient Ridge” (RRR)
4. The “Incredible Indestructible Ridge” (IIR)
5. The “Grim Drought Reaper” (GDR)