29 July 2026·PIB

PARLIAMENT QUESTION: SPACE TECHNOLOGY FOR DISASTER MANAGEMENT IN LADAKH

In this note

1. At a Glance

Govt uses satellite + geospatial tech (ISRO/DoS) to monitor glaciers, glacial lakes, snow-cover, water resources, landslides in Ladakh [1].
Answered in Parliament, 29 Jul 2026, Dept of Space [1].
Core case study linking space tech ↔ disaster management ↔ Himalayan hazards — high-yield for Prelims (numbers) and Mains GS-III (disaster mgmt, S&T).

Parliament Question reply dated 29 Jul 2026 (PIB, Dept of Space) detailing Ladakh glacier/glacial lake/GLOF monitoring [1].

ISRO's Disaster Management Support Programme (DMSP) feeds satellite data to nodal ministries for cyclones, floods, landslides, forest fire, earthquake, GLOF, drought [2].
National Hydrology Project (NHP), Ministry of Jal Shakti — NRSC/ISRO implementing agency for hydrological studies via satellite/geospatial tech [3].
Glacial lake inventory for Indus basin published Dec 2020; Ganga basin inventory also prepared [3].
Baseline Glacial Lake Inventory 2011 by NRSC — CWC monitors lakes >10 ha from this [3].
National GLOF Risk Mitigation Project (NGRMP) approved for Arunachal Pradesh, Himachal Pradesh, Sikkim, Uttarakhand — outlay Rs 150 crore (Ladakh not included in this specific project) [2].

Item	Detail
Nodal Dept (Ladakh PQ)	Department of Space [1]
Glacier database	>2,000 glaciers mapped using 2020-23 satellite data [1]
Glacier change mapping	>1,000 glaciers tracked over two decades [1]
Glacial lakes inventory (Ladakh)	3,219 lakes >0.25 ha, under NHP [1]
GLOF risk modelling	High-risk lakes incl. Katkar, Suru (Ladakh) [1]
Implementing agency (satellite/geospatial)	NRSC/ISRO [3]
Parent scheme	National Hydrology Project, Ministry of Jal Shakti [1][3]
Nodal monitoring agency (lakes >10 ha)	Central Water Commission (CWC), MoJS [3]
Satellite used for lake mapping	Resourcesat-2 (LISS-IV) [3]
National GLOF project states	Arunachal Pradesh, Himachal Pradesh, Sikkim, Uttarakhand — Rs 150 crore [2]
Related ISRO Ladakh infra	NETRA optical telescope at Hanle (space object tracking, distinct from disaster mgmt) [2]

Environmental

Glacier retreat monitoring critical for Ladakh's cold-desert hydrology, water security [1].
GLOF risk from lakes like Katkar, Suru threatens downstream settlements [1].

Scientific/Technological

Multi-decadal satellite data (2020-23 for glaciers) enables trend analysis, not just snapshot [1].
Daily snow-cover mapping over Indian Himalaya = operational remote-sensing capability [1].

Administrative

Multi-agency: Dept of Space (ISRO/NRSC) generates data; Ministry of Jal Shakti/CWC owns hydrology mandate — federal-tech coordination model [1][3].
Ladakh (UT, no legislature) excluded from NGRMP's 4-state list — gap worth noting [2].

Geopolitical/Strategic

Ladakh = border UT (China, Pakistan proximity); disaster resilience data also has strategic surveillance overlap (cf. NETRA at Hanle) [2].

29 Jul 2026: PIB release on Parliament Question — Ladakh glacier/glacial lake/snow data (2,000+ glaciers, 3,219 lakes) [1].
NGRMP ongoing across 4 Himalayan states, Rs 150 crore outlay (period per S2 release) [2].

Ladakh glacier database: 2,000+ glaciers, built from 2020-23 satellite data [1].
Change mapped for 1,000+ glaciers over two decades [1].
Ladakh glacial lakes inventory: 3,219 lakes (>0.25 ha) [1].
GLOF-modelled high-risk Ladakh lakes: Katkar, Suru [1].
Glacial lake inventory done under National Hydrology Project, Ministry of Jal Shakti (not MoEFCC) [1].
Implementing agency for satellite hydrology studies: NRSC (ISRO) [3].
Baseline national glacial lake inventory year: 2011 (NRSC) [3].
CWC monitors lakes >10 ha, June–October annually [3].
National GLOF Risk Mitigation Project (NGRMP): 4 states — Arunachal Pradesh, HP, Sikkim, Uttarakhand — Rs 150 crore [2]. Note: Ladakh NOT part of NGRMP.
Satellite sensor used for lake mapping: Resourcesat-2, LISS-IV [3].
Indus basin glacial lake inventory published: December 2020 [3].
ISRO's disaster-data programme: Disaster Management Support Programme (DMSP) [2].
NETRA telescope (space object tracking, GEO) located at Hanle, Ladakh — distinct from disaster mgmt work [2].

GS-III: Disaster Management; Science & Tech — space applications; Environment — Himalayan ecology/climate change.
GS-I: Geography — glaciology, Himalayan hydrology.
Sample stems:
"Discuss role of space-based technologies in glacial lake outburst flood (GLOF) risk mitigation in Indian Himalayas."
"Ladakh's fragile ecology demands integrated disaster management. Examine role of satellite/geospatial monitoring in this context."
"Critically evaluate coordination between Dept of Space and Ministry of Jal Shakti in Himalayan disaster preparedness."

National GLOF Risk Mitigation Project (NGRMP) — direct policy cousin, different state coverage [2].
ISRO's Disaster Management Support Programme (DMSP) — broader satellite-disaster framework [2].
National Hydrology Project (Ministry of Jal Shakti) — parent scheme for hydrological data [3].
Cold desert/Himalayan ecology of Ladakh — environmental context.
NDMA & Disaster Management Act 2005 — institutional/legal backdrop.
Climate change and Himalayan glacier retreat — IPCC/environmental linkage.
NETRA project, Hanle observatory — related ISRO Ladakh infra (different mandate).

Confusing NGRMP (4 states: AP, HP, Sikkim, Uttarakhand) with Ladakh GLOF monitoring — Ladakh is covered under NHP glacial lake inventory, NOT NGRMP [1][2].
Wrong ministry: glacial lake inventory is Ministry of Jal Shakti (NHP), executed by NRSC/ISRO (Dept of Space) — dual-agency, don't assign to one alone [1][3].
Mixing up CWC's >10 ha monitoring (2011 baseline) with the Ladakh-specific >0.25 ha, 3,219-lake NHP inventory — different thresholds/scopes [1][3].
NETRA (Hanle) is space object tracking, not disaster management — don't conflate with GLOF work [2].