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