Lok Sewa Geography Quick Revision: Core Facts on Nepal’s Physical and Political Landscape

Overview of Nepal’s Physical Geography

For candidates preparing for Lok Sewa Aayog (Public Service Commission) examinations, physical geography constitutes a major portion of Paper I (General Knowledge). Nepal is a landlocked nation situated between China to the north and India to the east, west, and south. Understanding exact dimensions, coordinates, and topographical demarcations is critical for scoring well in multiple-choice questions.

The total area of Nepal stands at 147,516 square kilometers, the figure used since Nepal’s updated political map of 2020 (older textbooks list 147,181 sq km). Nepal accounts for approximately 0.03% of the world’s landmass and roughly 0.3% of Asia.

Coordinates and Dimensions

• Latitude: 26° 22′ N to 30° 27′ N
• Longitude: 80° 04′ E to 88° 12′ E
• East-West Length: Average of 885 km
• North-South Width: Average of 193 km (Maximum: ~241 km, Minimum: ~145 km)
• Standard Time: Based on the Gauri Shankar Himal meridian (86° 15′ E), set at UTC +5:45 on B.S. 2042 Baisakh 1 (April 14, 1985).

Ecological Regions

Nepal is traditionally classified into three distinct ecological regions running east to west:

1. Mountain Region (Himal)

Covering the northernmost tier, this zone lies generally above 3,000 meters (or 3,300 meters depending on specific ecological definitions) up to 8,848.86 meters. It hosts eight of the world’s fourteen peaks exceeding 8,000 meters. The region accounts for roughly 15% of the country’s total land area but has the lowest population density.

2. Hill Region (Pahad)

Positioned between the Terai and the High Himalayas, the Hill region spans elevations between roughly 600 meters and 3,000 meters. It comprises major sub-ranges including the Mahabharat Range (Lesser Himalayas) and the Chure (Siwalik) Range. This region occupies approximately 68% of Nepal’s total land area.

3. Terai Region (Madhesh)

The southern lowland plain extends from the Indian border up to the base of the Chure hills, generally ranging from around 60 meters to 600 meters above sea level. Accounting for about 17% of the total landmass, it represents the primary agricultural base of the country and holds more than half of the national population.

Major River Systems of Nepal

Nepal’s drainage system is organized primarily into three first-order river basins, all flowing south into the Ganges basin:

• Koshi River System (East): Comprises seven major tributaries (Saptakoshi): Sunkoshi, Tamakoshi, Dudhkoshi, Indrawati, Likhu, Arun, and Tamor. Arun is the largest trans-Himalayan tributary, while Tamor is the easternmost.
• Gandaki River System (Central): Also known as the Saptagandaki or Narayani: Trishuli, Budhi Gandaki, Marsyangdi, Seti Gandaki, Madi, Kali Gandaki, and Daraudi. The Kali Gandaki forms the world’s deepest gorge (Dana Gorge) between Dhaulagiri and Annapurna.
• Karnali River System (West): The longest river system within Nepal’s borders. Major tributaries include the Humla Karnali, Mugu Karnali, Tila, Bheri, Seti (West), and Budhi Ganga.
• Southern River Systems: Medium rivers originating in the Mahabharat Range (such as the Mechi, Kankai, Kamala, Bagmati, Tinau, and Babai) and seasonal rivers originating in the Chure hills.

Key Geographic Extremes and Landmarks

Lok Sewa frequently tests candidate knowledge regarding comparative geographical features:

• Highest Point: Mount Everest (Sagarmatha) – 8,848.86 m (jointly remeasured and announced by Nepal and China in December 2020).
• Lowest Point: Mukhiyapatti Musharniya, Dhanusha district – approximately 59 meters above sea level, according to a 2017 government survey (older textbooks list Kechana Kalan, Jhapa, at about 70 m).
• Deepest Lake: Phoksundo Lake (Shey Phoksundo National Park, Dolpa).
• Highest Altitude Lake: Tilicho Lake (Manang, 4,919 m). Kajin Sara Lake (Manang) has been claimed to be higher, but its altitude has not been officially verified.
• Largest Lake by Surface Area: Rara Lake (Mugu district).

Administrative Divisions

Following the Constitution of Nepal (2072), the country is divided into:

• 7 Provinces: Koshi, Madhesh, Bagmati, Gandaki, Lumbini, Karnali, and Sudurpashchim.
• 77 Districts: Rukum and Nawalparasi were bifurcated into two administrative districts each under the federal structure.
• 753 Local Levels: Comprising 6 Metropolitan Cities, 11 Sub-Metropolitan Cities, 276 Municipalities, and 460 Rural Municipalities (Gaunpalika).

Always verify syllabus updates and current administrative boundary classifications on the official portal of Lok Sewa Aayog (psc.gov.np) before sitting for your examination.

Frequently asked questions

What is the official height of Mount Everest recognized in exams?

The officially recognized height announced jointly by Nepal and China in December 2020 is 8,848.86 meters.

Which river is the longest within Nepal?

The Karnali River is recognized as the longest river flowing within the borders of Nepal.

On what meridian is Nepal Standard Time calculated?

Nepal Standard Time is calculated based on the meridian of Gauri Shankar Himal at 86° 15′ East longitude (UTC +5:45).