Hydrology is

Options

A. Charting out of all surface waters
B. Study of above-ground inland waters
C. Study of inland ground water
D. Both B and C

Answer

**Step-by-Step Text Solution:**

1. **Understanding Hydrology**: Hydrology is derived from the Greek words "hydro," meaning water, and "logy," meaning study. Therefore, hydrology is essentially the study of water.

2. **Identifying the Components of Hydrology**: Hydrology encompasses various aspects of water, including:
- Above-ground inland waters (such as rivers, lakes, and reservoirs).
- Inland groundwater (the water found underground in aquifers).

3. **Evaluating the Options**:
- **Option 1**: "Charting out of all surface waters" - This is not a comprehensive definition of hydrology, as it does not include groundwater.
- **Option 2**: "Study of above ground inland waters" - This is a correct aspect of hydrology but does not encompass the entire field.
- **Option 3**: "Study of inland groundwater" - This is also a correct aspect of hydrology but, like option 2, does not cover the full scope.
- **Option 4**: "Both B and C" - This option correctly identifies that hydrology includes both the study of above-ground inland waters and inland groundwater.

4. **Conclusion**: Since hydrology includes both above-ground and underground water studies, the correct answer is **Option D: Both B and C**.

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