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