The part of the precipitation, snowmelt or irrigation water that appears in uncontrolled surface streams is generally ca…

The system to collect night soil, garbage etc. in separate vessels or deposited in pools and pits is called ___

The area of land where all the precipitation falls will flow downhill into a specific stream called ___

The relatively clean wastewater from baths, sinks, washing machines and other kitchen appliances is called ____

The benefits of the society of managing human excreta are considerable, for public health as well as for the environment…

Which of the following conditions is not suitable for the disposal of excreta or sewage?

Which of the following factors does the dry weather does not depend on?

Which of the following common unit is used to express the rate of water supply to a city or town?