Natural Resources of Nepal
Natural resources are gifts of nature — water, forest, land, minerals, air — that humans use to satisfy their wants. Nepal is the 2nd-richest country in water in the world (1st in Asia) with about 83,000 MW hydropower potential, has 45.31% of its area under forest, and is rich in minerals like limestone, iron, and marble. But mismanagement, deforestation, and climate change threaten these resources, so a sustainable management approach is essential.
In this chapter
Meaning of Natural Resources
Natural resources are the materials and forces found in nature that humans can use to satisfy their wants — for example, rivers, forests, soil, minerals, sunlight, and wind. They are free gifts of nature and existed long before humans. In Nepal, the Koshi, Gandaki, and Karnali river systems, the forests of the Chure and Terai, and minerals like limestone (Udaipur) and marble (Godavari) are all natural resources. The way humans exploit these resources decides whether a country becomes rich or remains poor.
Classification of Natural Resources
| Basis | Types | Examples |
|---|---|---|
| Renewability | Renewable (नवीकरणीय) | Water, forest, solar, wind — can regrow/replenish |
| Renewability | Non-renewable (अनवीकरणीय) | Minerals, coal, petroleum — once used, gone |
| Origin | Biotic (जैविक) | Plants, animals, birds — have life |
| Origin | Abiotic (अजैविक) | Land, water, air, minerals — no life |
| Stage of use | Potential (सम्भाव्य) | Resource exists but not yet used (e.g. hydro potential 83,000 MW) |
| Stage of use | Actual (वास्तविक) | Resource currently being used (e.g. installed hydro 2,449 MW) |
| Stage of use | Reserve (सञ्चित) | Known quantity that can be economically extracted |
| Stage of use | Stock (भण्डार) | Total quantity in nature; not all may be usable |
Water Resources of Nepal
Nepal is the 2nd-richest country in the world in water resources (after Brazil) and 1st in Asia. About 6,000 rivers flow across the country — including the three major river systems Koshi (east), Gandaki (central), and Karnali (west) — plus countless streams and glaciers. Sources of water in Nepal are: (i) surface water (rivers, lakes, ponds), (ii) groundwater (underground aquifers in the Terai), and (iii) rainwater (monsoon brings about 1,500 mm/year). Nepal's theoretical hydropower potential is about 83,000 MW, of which only about 2,449 MW has been installed so far — meaning we use less than 3% of our potential!
Hydropower equation (P = power in watts, η = efficiency, ρ = water density 1000 kg/m³, g = 9.81 m/s², Q = flow in m³/s, H = head in metres)
Nepal's Water Resource Potential
| Item | Value | Notes |
|---|---|---|
| Major river systems | 3 (Koshi, Gandaki, Karnali) | East to west across country |
| Total rivers | ~6,000 | Including small streams |
| Annual water availability | ~225 billion m³ | Most flows to India |
| Theoretical hydropower potential | 83,000 MW | 2nd richest in world |
| Economically feasible hydropower | ~42,000 MW | About half of theoretical |
| Installed hydropower (FY 2080/81) | ~2,449 MW | Less than 3% of potential |
| Irrigation potential | ~2.2 million hectare | Terai is most irrigated |
| Drinking water access | ~87% population | Urban areas better served |
Why Water Is Nepal's Gold
Water is multi-purpose for Nepal: (1) Agriculture — irrigates Terai rice fields; (2) Energy — hydroelectricity is Nepal's main power source; (3) Industry — factories need water for cooling and processing; (4) Tourism — rafting on Bhote Koshi, boating on Phewa Lake; (5) Drinking — Melamchi project supplies Kathmandu; (6) Fisheries — fish farming in ponds and lakes; (7) Transportation — boats in Koshi and Narayani rivers. Yet, problems like floods, lack of irrigation, drinking water shortage in cities, and low hydro-installed capacity remain.
Forest Resources of Nepal
Forests cover 45.31% of Nepal's total land area (Forest Survey, 2016). Forests give us timber, firewood, herbs (yarsagumba, panchaule), fodder for livestock, and protect soil from erosion. Nepal pioneered community forestry in the 1980s — local user groups manage forests themselves, and successful examples include the Chandeshwori community forest (Sindhupalchok) and many in Kavre and Dhading. The Chure range is being rapidly deforested, causing floods in the Terai. Forests also absorb CO₂ and help fight climate change.
Causes and Consequences of Deforestation in Nepal
| Causes (कारण) | Consequences (परिणाम) |
|---|---|
| Population growth → need for housing & farmland | Soil erosion → landslides in hills |
| Illegal logging in Chure & Terai | Floods in Terai (rivers fill with sediment) |
| Demand for firewood (75% still use biomass) | Loss of biodiversity — wildlife habitat gone |
| Forest fire (intentional + accidental) | Climate change — more CO₂ in atmosphere |
| Encroachment by settlers & politicians | Drying up of water sources (springs disappear) |
| Overgrazing by livestock | Decline in non-timber forest products (herbs) |
| Infrastructure (roads, transmission lines) | Increased poverty for forest-dependent families |
Mineral Resources and Natural Resource Management
Nepal has minerals like limestone (Udaipur, Dhankuta), iron (Phulchowki), marble (Godavari), slate, quartz, and magnesite. Copper was historically mined in Wapsa (Okhaldhunga). But exploration is limited and most mines are not economically viable to operate. Problems: lack of geological survey, weak technology, difficult terrain, environmental concerns. Natural resource management means using resources wisely so they last for future generations — combining conservation, sustainable use, and equitable benefit-sharing. Community forestry is one successful model; national parks (Chitwan, Sagarmatha, Langtang) conserve biodiversity while supporting tourism.
Climate Change and Its Economic Effects
- Climate change means long-term changes in temperature, rainfall, and weather patterns — mainly caused by burning fossil fuels (CO₂ emissions) and deforestation. Though Nepal contributes very little to global emissions, it is the 4th-most vulnerable country to climate change (German Watch). Economic effects: (1) Agriculture — irregular monsoon damages rice in Terai, droughts in hills
- (2) Glaciers melting — Himalayan glaciers like Imja (Khumbu) are forming dangerous glacial lakes that can burst
- (3) Floods & landslides — every year destroy infrastructure worth billions
- (4) Tourism — snow-capped peaks shrinking affects trekking
- (5) Health — spread of malaria and dengue to higher altitudes. Nepal signed the Paris Agreement (2015) and committed to net-zero by 2045.
Practice Problem
A proposed hydropower plant in Lamjung district has a water flow Q = 8 m³/s and an effective head H = 120 m. The turbine-generator efficiency η = 0.80. (a) Calculate the electrical power output in watts and megawatts. (b) If the plant operates 280 days per year, what is the annual energy generation in kWh?
Quick Revision
- Natural resources = free gifts of nature (water, forest, land, minerals).
- Classification: renewable/non-renewable, biotic/abiotic, potential/actual/reserve/stock.
- Nepal = 2nd richest in water in world (1st in Asia); ~6,000 rivers; 83,000 MW hydro potential.
- Only ~2,449 MW hydro installed so far (less than 3% of potential).
- Forest covers 45.31% of Nepal; community forestry is a success story.
- Chure deforestation causes Terai floods; main causes: population, firewood, encroachment.
- Minerals: limestone (Udaipur), iron (Phulchowki), marble (Godavari) — under-exploited.
- Nepal = 4th most vulnerable to climate change; affects agriculture, glaciers, tourism, health.
- Sustainable management = conserve + use wisely + share benefits fairly.