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