Range Forest Officer recruitment (state exams) · India · State Public Service Commissions and state forest departments (e.g. MPPSC, UKPSC, UPPSC)
Original practice questions written to the published syllabus · not past papersHow forests affect the water cycle and how forested watersheds are managed for water yield, quality and soil protection. Engineering design of conservation structures is covered in the Agricultural Engineering track (watershed-hydrology, soil-water-conservation-engineering); this subject covers the forest side.
In the exams: IFoS Forestry Paper I Section B (watershed management); ICAR AICE-JRF 59 Unit 8; ICAR AIEEA-PG Group 09 (watershed management); Korea Forestry Engineer written subject Erosion Control Engineering
How our questions for Range Forest Officer recruitment spread across the units of Forest Hydrology & Watershed Management. Difficulty: 16 easy, 16 medium, 0 hard.
| Evapotranspiration of forests and water yield | 4 | |
| Watershed concept, delineation and prioritisation | 4 | |
| Erosion processes and sediment yield from forest land | 4 | |
| Forest influences on climate, water and soil | 3 | |
| Interception, throughfall, stemflow and infiltration under forest | 3 | |
| Effects of harvesting, plantations and fire on streamflow | 3 | |
| Vegetative and simple structural measures for watershed treatment | 3 | |
| Integrated and participatory watershed management programmes | 3 | |
| Paired-catchment studies and hydrological monitoring | 3 | |
| Riparian buffers and stream protection | 2 |
Choose an answer, then open the working. Each explanation says why the right answer is right and why the others are not.
Compared with open land, the microclimate under a forest canopy has:
A. Cooler days and higher humidity
Shade and transpiration cool the canopy interior and raise humidity; wind is reduced.
Compared with grassland catchments of the same rainfall, forested catchments usually:
C. Yield less water, but cleaner
Higher interception and transpiration reduce yield; forest soils give clean water.
Forest litter protects soil from erosion mainly by:
C. Absorbing raindrop energy and slowing overland flow
Litter prevents splash detachment and surface sealing.
With gross rainfall 1200 mm, throughfall 900 mm and stemflow 30 mm, interception loss as a percentage of rainfall is:
B. 22.5%
270 ÷ 1200 = 22.5%. 25% ignores stemflow; 77.5% is net rainfall share.
For the catchment with 1500 mm rainfall and 600 mm streamflow, the runoff coefficient is:
D. 0.4
Q/P = 600/1500 = 0.4. 0.6 is ET/P.
A watershed of 30 km² contains 45 km of streams. What is its drainage density?
C. 1.5 km/km²
Drainage density = 45 ÷ 30 = 1.5 km/km². Inverting gives 0.67.
Buffer widths are usually set according to:
A. Stream size, slope and value of the water resource
Wider buffers apply to larger streams, steeper slopes and important resources.
Sukhomajri in Haryana is known for:
B. Grazing protection exchanged for water shares
Villagers protected hills in return for water from small dams; Sukhna Lake siltation fell.
Ralegan Siddhi in Maharashtra is an example of:
C. Community water harvesting
Social rules and water harvesting transformed the village.
For a 90° V-notch weir with Q = 1.38 H^2.5 (m³/s, H in m), what is the discharge at a head of 0.2 m?
A. 0.025 m³/s
Q = 1.38 × 0.2^2.5 = 1.38 × 0.0179 = 0.025 m³/s. 0.276 omits the exponent.
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