Read text B and find in the text the sentences in which it is explained why a sub-surface water source may become saline

Text B

Sources of Fresh Water

Ground Water

Words:

pore – пора

distinction – различие

spring – источник, родник

substantial – значительный

reverse – поворачивать в противоположном направлении

endorheic – эндогенный – внутреннего происхождения; объясняемый внутренними причинами

Sub-surface water, or groundwater, is fresh water located in the pore space of soil and rocks. It is also water that is flowing within aquifers below the water table. Sometimes it is useful to make a distinction between sub-surface water that is closely associated with surface water and deep sub-surface water in an aquifer (sometimes called "fossil water").

The natural input to sub-surface water is seepage from surface water. The natural outputs from sub-surface water are springs and seepage to the oceans.

If the surface water source is also subject to substantial evaporation, a sub-surface water source may become saline. This situation can occur naturally under endorheic bodies of water, or artificially under irrigated farmland. In coastal areas, human use of a sub-surface water source may cause the direction of seepage to ocean to reverse which can also cause soil salinization. Humans can also cause sub-surface water to be "lost" (i.e. become unusable) through pollution. Humans can increase the input to a sub-surface water source by building reservoirs or ponds.

Find in the text international words and give their Russian equivalents.

8. Find in the text the equivalents to the following word combinations:

пористое пространство; в пределах водоносного слоя; ниже водной поверхности; естественный приток; естественный отток; подвергается значительному испарению; становиться солёной; эндогенные водоёмы; орошаемые фермерские земли; прибрежные территории; повысить приток

Say if it is true or false.

1) Groundwater is fresh water located in rivers and ponds.

2) Sub-surface water is water that is flowing within aquifers below the water table.

3) The natural input to sub-surface water is seepage from precipitation.

4) The natural outputs from sub-surface water are springs and seepage to the oceans.

5) A sub-surface water source may become saline due to substantial evaporation.

6) Humans can decrease the input to a sub-surface water source by building reservoirs or ponds.

10. Read text C and answer the questions:

1) Why is the amount of water on the globe unchangeable?

2) Where is Earth’s water located?

3) What is the main source of water people use?

Text C