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