Water quality refers to the chemical, physical, and biological characteristics of water, indicating its suitability for a specific purpose such as drinking, irrigation, or industrial use. It is

8.1) Water quality refers to the chemical, physical, and biological characteristics of water, indicating its suitability for a specific purpose such as drinking, irrigation, or industrial use. It is determined by measuring various parameters against established standards.

8.2)

• The sector that uses the most water in the diagram is agriculture.
• Reason: Agriculture, particularly for irrigation of crops and livestock, is typically the largest consumer of water globally and in South Africa. This is due to the vast amounts of water required for crop growth and food production to sustain populations.

8.3) Four ways through which water can be used wisely in agriculture are:

• Drip irrigation: This method delivers water directly to the roots of plants, significantly reducing water loss through evaporation and runoff compared to traditional methods.
• Rainwater harvesting: Collecting and storing rainwater in tanks or dams for later use in irrigation can supplement water supply and reduce reliance on other sources.
• Planting drought-resistant crops: Selecting crop varieties that naturally require less water or are more tolerant to dry conditions can reduce overall water demand.
• Mulching: Applying a layer of organic material (mulch) to the soil surface helps retain soil moisture by reducing evaporation, suppressing weeds, and improving soil health.