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Natural Hazards of UP
Natural disasters in Uttar Pradesh — seismic zones, flood-prone areas, Bundelkhand droughts, heat waves, cold waves, fog, and disaster management for UPSSSC AGTA.
Introduction
Uttar Pradesh is vulnerable to multiple natural hazards due to its large geographical area, diverse terrain, and proximity to the seismically active Himalayan zone. From devastating floods in the east to chronic droughts in Bundelkhand, and from earthquakes to extreme weather events, disaster preparedness is a critical concern for the state.
Seismic Zones of UP
India is divided into 4 seismic zones (II to V), with Zone V being the most seismically active. UP falls primarily in Zones II, III, and IV.
Zone-wise Distribution
| Seismic Zone | Risk Level | Areas in UP |
|---|---|---|
| Zone IV | High Damage Risk | Northern UP — parts of Indo-Gangetic plain near Nepal border (Gorakhpur, Bahraich, Lakhimpur Kheri, Maharajganj) |
| Zone III | Moderate Damage Risk | Most of UP — Lucknow, Kanpur, Varanasi, Prayagraj, Meerut, Agra |
| Zone II | Low Damage Risk | Southern UP — Bundelkhand, parts of Vindhyan region |
Key Earthquake Facts
| Fact | Detail |
|---|---|
| Most vulnerable zone | Zone IV — northern districts along Nepal border |
| Reason for risk | Proximity to Main Boundary Thrust (MBT) of Himalayas |
| Historical earthquake | 1934 Bihar-Nepal Earthquake (8.1 M) — felt severely across eastern UP |
| 2015 Nepal Earthquake | 7.8 M — significant damage in northern UP districts |
| Building codes | BIS (Bureau of Indian Standards) seismic design codes apply |
Northern UP districts in Zone IV are at risk because they sit on deep alluvial deposits that amplify seismic waves — a phenomenon called site amplification.
Floods — Eastern UP’s Annual Challenge
Flooding is the most frequent and destructive natural hazard in Uttar Pradesh, primarily affecting the eastern and central regions.
Flood-Prone River Basins
| River | Origin | Flood-Prone Districts |
|---|---|---|
| Ghaghra (Sarayu) | Tibet/Nepal | Bahraich, Barabanki, Ayodhya, Azamgarh |
| Rapti | Nepal | Gorakhpur, Deoria, Maharajganj |
| Gandak | Nepal | Kushinagar, Deoria |
| Sharda (Mahakali) | Nepal | Lakhimpur Kheri, Pilibhit |
| Ganga | Uttarakhand | Varanasi, Prayagraj, Ballia |
| Gomti | Pilibhit (UP) | Lucknow, Jaunpur |
| Yamuna | Uttarakhand | Agra, Mathura (occasional) |
Why Eastern UP Floods Annually
- Rivers originate in Nepal Himalayas — carry enormous volume during monsoon
- Flat terrain with gentle gradient — water cannot drain quickly
- Silting raises riverbeds — rivers overflow banks easily
- Deforestation in Nepal catchments increases runoff
- ~73,000 sq km of UP is flood-prone (about 30% of state area)
Flood Impact
| Impact | Detail |
|---|---|
| Annual affected population | ~2–3 crore people |
| Crop damage | Kharif crops (rice, maize) destroyed annually |
| Infrastructure | Roads, bridges, embankments damaged |
| Displacement | Lakhs displaced every monsoon season |
| Waterborne diseases | Cholera, typhoid, diarrhea spike during/after floods |
Droughts — Bundelkhand’s Chronic Crisis
While eastern UP battles floods, Bundelkhand faces the opposite extreme — recurring droughts.
Drought-Prone Districts
| District | Division | Key Issue |
|---|---|---|
| Jhansi | Jhansi | Rocky terrain; poor groundwater |
| Lalitpur | Jhansi | Very low irrigation coverage |
| Jalaun | Jhansi | Ravine erosion; thin soil |
| Hamirpur | Chitrakoot | Water scarcity; migration |
| Mahoba | Chitrakoot | Historical tanks silted |
| Banda | Chitrakoot | Most drought-affected; extreme heat |
| Chitrakoot | Chitrakoot | Forested but water-scarce |
Causes of Drought
- Rainfall: 75–100 cm (below state average of ~110 cm)
- Rocky/impervious soil — poor groundwater recharge
- Deforestation and degradation of catchment areas
- Traditional Chandela-era tanks have silted up
- Over-extraction of limited groundwater
Government Response
| Initiative | Purpose |
|---|---|
| Bundelkhand Package (2009, 2012) | Drought relief, water conservation |
| Ken-Betwa River Link | Long-term water transfer solution |
| MGNREGA | Employment during drought years |
| PM Krishi Sinchai Yojana | Micro-irrigation expansion |
| Watershed Development | Rainwater harvesting, check dams |
Heat Waves (लू / गर्म लहर)
Heat waves are a life-threatening hazard in UP, particularly in western UP and Bundelkhand.
Heat Wave Criteria (IMD Definition)
| Category | Plain Areas | Hilly Areas |
|---|---|---|
| Heat Wave | Max temp ≥ 40°C and departure ≥ 4.5°C from normal | Max temp ≥ 30°C with same departure |
| Severe Heat Wave | Max temp ≥ 40°C and departure ≥ 6.5°C from normal | — |
Most Affected Areas
| District | Peak Temperature | Period |
|---|---|---|
| Banda | 47–48°C | May–June |
| Jhansi | 46–47°C | May–June |
| Agra | 45–46°C | May–June |
| Prayagraj | 45–47°C | May–June |
Impact
- Hundreds of heat-related deaths reported annually
- Crop wilting — especially late Rabi crops
- Water demand spikes; borewells dry up
- Power grid strain from air conditioning demand
Cold Waves (शीत लहर)
| Feature | Detail |
|---|---|
| Period | December – February (peak in January) |
| Criteria | Min temp ≤ 10°C and departure ≥ 4.5°C below normal |
| Most affected | Western UP — Meerut, Agra, Muzaffarnagar |
| Lowest temperatures | 1–3°C recorded in western UP |
| Impact | Hypothermia deaths among homeless; Rabi crop frost damage |
Dense Fog (कोहरा)
| Feature | Detail |
|---|---|
| Period | December – January |
| Worst affected | Gangetic Plain — Lucknow, Varanasi, Kanpur, Agra |
| Visibility | Drops to below 50 meters in severe events |
| Duration | Can persist for 12–18 hours continuously |
| Transport impact | Hundreds of trains delayed; flights cancelled; road accidents |
| Agriculture impact | Delays wheat flowering; promotes fungal diseases |
Disaster Management Framework
National Level
| Body | Role |
|---|---|
| NDMA (National Disaster Management Authority) | Policy, plans, guidelines |
| NDRF (National Disaster Response Force) | Specialized rescue and relief |
| IMD (India Meteorological Department) | Weather warnings, forecasts |
| CWC (Central Water Commission) | Flood forecasting |
State Level
| Body | Role |
|---|---|
| UPSADMA (UP State Disaster Management Authority) | State-level disaster planning |
| SDRF (State Disaster Response Force) | State rescue operations |
| Relief Commissioner | Coordinates flood/drought relief |
| District Magistrate | District-level disaster management head |
NDRF Battalions in UP
| Location | Battalion | Covers |
|---|---|---|
| Varanasi | 9th Battalion NDRF | Eastern UP |
| Ghaziabad | 8th Battalion NDRF | Western UP |
Hazard Summary Matrix
| Hazard | Most Affected Region | Peak Period | Primary Cause |
|---|---|---|---|
| Earthquake | Northern UP (Zone IV) | Any time | Himalayan tectonic activity |
| Floods | Eastern UP | July–September | Nepal-origin river flooding |
| Drought | Bundelkhand (7 districts) | June–September (failure) | Low/erratic rainfall + rocky terrain |
| Heat Wave | Western UP, Bundelkhand | May–June | Loo winds from Thar Desert |
| Cold Wave | Western UP | December–January | Central Asian cold air incursion |
| Fog | Gangetic Plain | December–January | High moisture + low temperature + calm winds |
Key Takeaways
- UP has areas in Seismic Zones II, III, and IV — northern districts near Nepal are in Zone IV (high risk)
- Floods are the most frequent disaster; ~73,000 sq km is flood-prone (eastern UP worst hit)
- Bundelkhand’s 7 districts face chronic drought due to rocky terrain and erratic rainfall
- Banda/Jhansi record temperatures up to 47–48°C; heat waves kill hundreds
- Dense fog in Dec–Jan reduces visibility below 50 m across the Gangetic Plain
- NDRF has 2 battalions in UP — 8th (Ghaziabad) and 9th (Varanasi)
Summary Cheat Sheet
| Term | Quick Recall |
|---|---|
| Seismic Zone IV in UP | Northern districts (Gorakhpur, Bahraich, Kheri) |
| Most of UP | Seismic Zone III |
| Flood-prone area | ~73,000 sq km (~30% of UP) |
| Key flood rivers | Ghaghra, Rapti, Gandak (Nepal origin) |
| Drought region | Bundelkhand (7 districts) |
| Hottest district | Banda (~48°C) |
| Heat wave threshold | ≥40°C + 4.5°C above normal |
| Cold wave threshold | ≤10°C + 4.5°C below normal |
| Fog months | December–January |
| NDRF in UP | 8th Bn (Ghaziabad), 9th Bn (Varanasi) |
| State disaster body | UPSADMA |
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