A) Water extraction B) Flood prevention C) Erosion control D) Sediment collection
A) Distance from vegetation B) Elevation of the riverbed C) Soil color D) Proximity to underground water flow
A) Silt B) Gravel and sand C) Loam D) Clay
A) 0.5 meter B) 0.3 meter C) 1 meter D) 2 meters
A) 0.3 meters B) 1.5 meters C) 0.5 meter D) 1 meter
A) Plastic B) Gravel C) Clay D) Cement
A) To prevent collapse B) To add weight C) To retain moisture D) To filter water
A) Coarse gravel B) Clay layer C) Bare earth D) Fine sand
A) Support the walls B) Facilitate water infiltration C) Prevent water from escaping D) Attract minerals
A) Cover with plastic B) Fill with soil C) Leave open to the air D) Cover with a permeable material
A) To attract rain B) To prevent contamination C) To keep animals out D) To increase evaporation
A) Only when it stops producing water B) Annually C) Never D) Regularly, especially after heavy rain
A) Sunlight exposure B) Excessive water extraction C) Sediment buildup D) Animal burrowing
A) Regular cleaning and maintenance B) Adding more gravel C) Ignoring it D) Using chemicals
A) Measuring tape B) Level C) Screwdriver D) Shovel
A) Dig alone B) Ignore potential hazards C) Work barefoot D) Wear gloves and eye protection
A) Increase water pressure B) Prevent sediment from entering the pump C) Cool the water D) Filter chemicals
A) Size of the riverbed B) Water demand and riverbed flow C) Number of people using the water D) Local regulations
A) It reduces evaporation B) It captures and utilizes subsurface flow C) It creates surface water storage D) It increases rainfall
A) Increased rainfall B) Improved soil fertility C) Groundwater contamination D) Reduced erosion
A) Vegetation nearby B) Damp soil a few feet down C) Standing water on the surface D) Evidence of past water flow
A) Any time of year B) During the dry season C) During the rainy season D) During a flood
A) To add pressure to the water flow B) To gather water from the surrounding gravel C) To release excess water D) To measure the water level
A) Lower yield in some cases B) Higher cost C) Requires electricity D) More complex construction
A) Windmill pump B) Centrifugal pump C) Submersible pump D) Hand pump
A) Adding chlorine B) Water filtration and purification C) Boiling the water D) Ignoring water quality
A) Over-extraction of water B) Regular maintenance and cleaning C) Ignoring sediment buildup D) Using substandard materials
A) Flash floods B) Extremely cold temperatures C) Volcanic eruptions D) Wild animals
A) Indicates groundwater presence B) Attracts wildlife C) Indicates soil quality D) Provides shade
A) Swale B) Drainage ditch C) Infiltration gallery D) Retention pond |