Watershed Management and Soil Conservation MCQs 2026

A watershed is best defined as

1. A a single tree plantation block only ✓
2. B a political district boundary only ✓
3. C an underground coal seam ✓
4. D an area of land that drains water to a common outlet ✓

Watershed management mainly aims to

1. A maximize clear-felling only ✓
2. B ban all vegetation forever ✓
3. C manage land and water resources for sustainable use and conservation ✓
4. D convert all catchments to concrete ✓

In Pakistan, watershed degradation in uplands often increases

1. A alpine glacier growth only ✓
2. B mangrove expansion inland ✓
3. C downstream flooding and reservoir siltation ✓
4. D zero sediment in rivers ✓

Soil erosion by water is accelerated when

1. A dense forest litter is maintained ✓
2. B contour vegetation strips are kept ✓
3. C mulch covers the surface ✓
4. D vegetation cover is removed and soil is exposed ✓

Sheet erosion refers to

1. A formation of deep narrow gullies only ✓
2. B wind deposition of dunes only ✓
3. C removal of a thin uniform layer of topsoil by runoff ✓
4. D landslides of whole hillsides only ✓

Rill erosion is characterized by

1. A only chemical weathering of rocks ✓
2. B only frost heaving without water ✓
3. C only underground solution caves ✓
4. D small channels cut by concentrated runoff ✓

Gully erosion involves

1. A only splash from raindrops ✓
2. B only salt crusting on flats ✓
3. C deep channels that cannot be removed by ordinary tillage ✓
4. D only glacial scour ✓

Contour bunding is a soil conservation practice that

1. A plants trees only on ridge tops randomly ✓
2. B drains all water as fast as possible ✓
3. C builds earthen bunds along contour lines to slow runoff ✓
4. D removes all terraces ✓

Terracing on steep slopes mainly helps to

1. A increase sheet wash always ✓
2. B reduce slope length and runoff velocity ✓
3. C remove all soil organic matter ✓
4. D ban agroforestry forever ✓

Check dams in gullies are used to

1. A accelerate headward cutting ✓
2. B remove all vegetation from banks ✓
3. C deepen the channel indefinitely ✓
4. D trap sediment and stabilize the gully bed ✓

Vegetative barriers (grass strips) on contours help by

1. A increasing wind speed at ground level ✓
2. B filtering runoff and trapping soil ✓
3. C guaranteeing zero infiltration ✓
4. D replacing the need for any cover crop ✓

Afforestation of degraded watersheds is important because trees

1. A improve infiltration and reduce peak runoff and erosion ✓
2. B always increase desertification ✓
3. C stop all rainfall permanently ✓
4. D replace the hydrological cycle entirely ✓

Overgrazing in mountain watersheds of Pakistan commonly leads to

1. A thicker litter and less runoff always ✓
2. B automatic gully healing ✓
3. C higher soil organic matter forever ✓
4. D loss of ground cover and accelerated erosion ✓

Siltation of Tarbela and Mangla reservoirs is strongly linked to

1. A erosion in upstream catchments ✓
2. B excess mangrove planting in the delta only ✓
3. C too little sediment from mountains ✓
4. D urban park mulching only ✓

A key principle of watershed approach is

1. A ignoring upstream-downstream linkages ✓
2. B treating the catchment as a planning and management unit ✓
3. C managing only the river mouth ✓
4. D excluding community participation always ✓

Mulching helps soil conservation mainly by

1. A protecting the soil surface from raindrop impact and reducing evaporation ✓
2. B increasing splash erosion ✓
3. C removing all organic matter ✓
4. D compacting subsoil permanently ✓

Contour ploughing means

1. A ploughing along contour lines rather than up and down the slope ✓
2. B ploughing straight down the steepest fall line ✓
3. C deep ripping only on ridge crests ✓
4. D zero tillage in all cases ✓

Wind erosion is a major concern especially in

1. A dense moist temperate forests only ✓
2. B permanently flooded mangroves only ✓
3. C glacier ice fields only ✓
4. D arid and semi-arid plains with sparse cover (e.g., parts of Punjab/Sindh/Balochistan) ✓

Shelterbelts reduce wind erosion by

1. A increasing gale force at soil surface ✓
2. B removing all field boundaries ✓
3. C replacing crops with bare fallow always ✓
4. D lowering wind speed near the ground ✓

Riparian vegetation along streams helps to

1. A stabilize banks and filter sediment from runoff ✓
2. B always widen gullies ✓
3. C increase bank collapse ✓
4. D remove all shade from water ✓

Landslide risk on steep forested slopes often rises after

1. A maintaining deep-rooted forest cover ✓
2. B deforestation and road cutting that destabilize slopes ✓
3. C careful contour drainage design ✓
4. D avoiding overloading toe cuts ✓

Soil organic matter improves conservation because it

1. A always disperses aggregates ✓
2. B enhances structure, infiltration and resistance to erosion ✓
3. C guarantees salinity increase ✓
4. D replaces the need for any cover ✓

Participatory watershed management emphasizes

1. A excluding villagers from all decisions ✓
2. B only top-down felling plans ✓
3. C involving local communities in planning and benefit sharing ✓
4. D military control of every nursery ✓

In rainfed Potohar and similar tracts, water harvesting structures aim to

1. A drain every drop to the sea instantly ✓
2. B increase sheet erosion on purpose ✓
3. C capture and store runoff for crops and recharge ✓
4. D ban contour farming ✓

Gully plugging with vegetation and structures is intended to

1. A deepen the gully head ✓
2. B remove all silt deposits ✓
3. C halt gully advance and reclaim eroded land ✓
4. D accelerate bank undercutting ✓

A hydrological effect of healthy forest cover in a watershed is often

1. A more regulated streamflow and reduced peak floods ✓
2. B instant conversion to desert ✓
3. C zero infiltration forever ✓
4. D permanent drying of all springs always ✓

Stone pitching or riprap on eroding banks is used to

1. A remove all bank protection ✓
2. B increase undercutting ✓
3. C armor the surface against scour ✓
4. D replace soil with loose sand only ✓

Contour trenching on degraded hillsides helps to

1. A channel all water into one gully ✓
2. B intercept runoff and support tree/grass establishment ✓
3. C expose subsoil to maximum splash ✓
4. D ban any planting in trenches ✓

Salinization of irrigated soils is a conservation concern because it

1. A always improves forest growth ✓
2. B eliminates the need for drainage ✓
3. C is unrelated to water management ✓
4. D reduces productivity and can degrade land ✓

The sediment delivery ratio concept relates to

1. A the fraction of eroded soil that reaches a downstream point ✓
2. B only the number of forest guards ✓
3. C only nursery polybag volume ✓
4. D only timber royalty rates ✓

Bioengineering for slope stabilization uses

1. A only concrete without any vegetation ✓
2. B only explosives ✓
3. C only chemical defoliants ✓
4. D living plants often with simple structures to reinforce soil ✓

Upstream soil conservation benefits downstream agriculture by

1. A reducing silt load and moderating flood peaks ✓
2. B increasing canal blockage always ✓
3. C eliminating irrigation need forever ✓
4. D raising desertification in plains always ✓

A common cause of watershed degradation in northern Pakistan is

1. A excess mangrove planting in Gilgit ✓
2. B deforestation, overgrazing and unsustainable cultivation on slopes ✓
3. C too much permanent snow cover management only ✓
4. D underuse of all mountain pastures ✓

Grassland and pasture improvement in watersheds helps by

1. A removing all forage species ✓
2. B maximizing bare soil patches ✓
3. C encouraging free overstocking without limit ✓
4. D maintaining ground cover that protects soil ✓

Farm ponds in a watershed can serve to

1. A increase gully headcut speed ✓
2. B store runoff for supplemental irrigation and livestock ✓
3. C replace all contour bunds with bare paths ✓
4. D eliminate groundwater recharge always ✓

The term 'catchment area' is essentially synonymous with

1. A watershed ✓
2. B only a single tree crown ✓
3. C only a district tehsil office ✓
4. D only a plywood mill yard ✓

Strip cropping for conservation involves

1. A planting only one crop downhill forever ✓
2. B clearing all strips to bare fallow ✓
3. C alternating strips of close-growing and erosion-prone crops on contours ✓
4. D removing all grass barriers ✓

Recharging groundwater in a watershed is favored by

1. A sealing the entire surface with concrete ✓
2. B infiltration-enhancing practices and vegetation cover ✓
3. C maximizing bare compacted soil ✓
4. D channelizing all rain to storm drains only ✓

Integrated watershed projects in Pakistan often combine

1. A only timber export without conservation ✓
2. B soil conservation, afforestation, water harvesting and livelihood support ✓
3. C only urban high-rise zoning ✓
4. D only offshore oil drilling ✓

The first line of defense against soil erosion on slopes is usually

1. A maintaining vegetative cover ✓
2. B complete deforestation ✓
3. C continuous bare fallow ✓
4. D deep clean tillage up and down slope ✓