| 1. | Many of our largest cities obtain their water supplies from surface water .
我们许多大城市从地表水获得水源。 |
| 2. | Common places in which we see surface water are ponds, lakes, and rivers .
我们通常看见地表水的地方是池沼，湖泊和江河。 |
| 3. | Fresh-water lakes and streams furnish nearly all of our surface water supplies .
我们所用的地表水几乎全由淡水湖和河流供给。 |
| 4. | Subsidence may be the critical factor in managing a ground water reservoir .
地面沉降在管理地表水库的工作中可以算是一个关键性因素。 |
| 5. | Surface waters comprise stream waters (e. g. rivers), oceans, lake, and impoundment water .
地表水包括流动水（例如河流）、海洋、湖泊和水库水。 |
| 6. | For storage purposes, these underground reservoirs have many advantages over surface reservoirs .
就蓄水目的说，这些地下水库比地表水库有很多优点。 |
| 7. | Submerged rocks are a pinkish-blue hue, while the open water tends to a desaturated blue .
淹没在水中的岩石呈浅粉红--蓝色调，但地表水接近于不饱和的蓝色。 |
| 8. | The cost of developing ground water may be lower in some areas than the cost of developing surface water .
在一些地区，开发地下水要比开发地表水的成本低。 |
| 9. | Many surface waters, particularly those emanating from swampy areas, are often colored to the extent .
许多地表水，特别是由沼泽地区流出的地表水常常染上一定程度的颜色。 |
| 10. | In arid climates, surface water is generally better than ground water in headwater areas, but poorer downstream .
在干旱气候的上游区，地表水一般较地下水好，但下游的地表较差。 |
