4. Data reconciliation note — why some numbers differ

Figures from different authorities and times are not always directly comparable. NESRA does not add incompatible datasets. Differences arise from:

• different reporting times (e.g. a 06:00 police recovery count vs a 09:00 NDRRMA update);
• different authority lists (NDRRMA, Nepal Police) still being reconciled;
• different definitions (bodies/human remains recovered vs deaths; missing vs out of contact);
• Nepal-scope vs broader cross-border totals — Nepal operational figures are kept separate from combined Nepal–Tibet disaster totals;
• foreign nationals reported as a subset of the missing, not an additional count;
• agency rescue counts (Army/Police/APF) that are subsets of the national NDRRMA total, not standalone national figures.

Cross-border context. Combined Nepal–Tibet totals reported internationally are larger than Nepal’s figures. This brief reports Nepal operational figures only.

6. Access & critical infrastructure

• Prithvi Highway (Muglin–Kathmandu): Trishuli erosion undermined the road base at Krishnabhir (Benighat Rorang, Dhading) on 30 August, severing the corridor; partial, one-way movement for essential vehicles was reported at points as clearance proceeds. Confirm current status with Traffic Police before travel.
• Dhunche: the alternative light-vehicle route via Kathmandu–Tokha–Kalikasthan remains open, with caution on risky sections.
• Primary Rasuwa corridor: the Betrawati–Rasuwagadhi / Timure–Syabrubesi route remains severely damaged and not open end-to-end; the Rasuwagadhi border road is not open.
• Infrastructure: approximately 40 km of road and 41 bridges were reported destroyed or damaged across the affected network; a broader restoration requirement (~42 Bailey bridges) is distinct from the immediate foreign-procurement initiative for 10 long Bailey bridges (~70 m). These are requirements or requests — not confirmed delivered or installed.

Physical condition (state of the structure) is shown separately from passability (whether an authority has established the route is open).

7. NESRA Earth Observation — Rapid EO Assessment v1

NESRA Rapid EO Assessment v1 is live. It is a rapid, cloud-limited Sentinel-2 flood/debris-path and exposure assessment (imagery 27 August 2026). No validated final NESRA flood extent or damage assessment has yet been published.

• 101.6 km river corridor assessed (92 km measured; 4.1 km under solid cloud).
• 3,216 buildings, 11.5 km of major road and 62 bridges intersect the mapped flood/debris path.
• Exposure is not verified damage; areas under cloud must not be read as unaffected — “no evidence” is not “no flooding”. Treat the mapped extent as an upper bound requiring field or official verification.

Earth Observation analysis led by Michael Hylind, NESRA Earth Observation Lead.

8. External Earth Observation

International Charter (activation 1052): eight external products are now listed, spanning Rasuwa pre/post mapping and mudflow/rockflow extent, Nuwakot pre/post damage imagery and a Timure–Syabrubesi impact map. These are external products, not NESRA-generated analysis.

Copernicus EMS (EMSR927): Rapid Mapping products have been released across multiple areas of interest. Within its mapped Syapru Besi area, Copernicus EMS reported more than 240 buildings destroyed and 32 damaged (WorldView-3, 27 August 2026).

Do not conflate datasets. The Copernicus figures are an external finding for a specific mapped area and are not NESRA findings; they are not comparable with NESRA’s 3,216 exposed-building figure (exposure ≠ verified damage) and must not be generalised to the whole corridor.

9. Recovery & reconstruction

The response is beginning to transition toward recovery. A Post-Disaster Needs Assessment (PDNA) / detailed loss-and-damage assessment is under development. A preliminary reconstruction requirement of approximately USD 4–5 billion has been cited by government.

Preliminary only. This is an early estimate, not a final damage figure; detailed assessment continues.

10. Key information gaps

• Reconciliation of missing-person lists across authorities and body identification (DNA/forensic management).
• Stability of the remaining upstream impoundment and slope/landslide risk.
• Authoritative road-restoration and passability timelines (Prithvi Highway / Krishnabhir; primary Rasuwa corridor).
• Tunnel / hydropower rescue and restoration status.
• A consolidated, authority-confirmed injured figure.
• Final loss-and-damage assessment (PDNA).
• Validated final NESRA EO flood extent and YIL geospatial products.

11. Selected sources

• NDRRMA 30 August operational update (impact, missing, rescued, mobilisation), relayed by RSS / national media.
• DHM / Flood Forecasting Division river and barrier-lake status, via RSS and Reuters.
• Department of Roads / Traffic Police and The Kathmandu Post — Prithvi Highway / Krishnabhir and Rasuwa access.
• International Charter activation 1052 (disasterscharter.org).
• Copernicus EMS EMSR927 (mapping.emergency.copernicus.eu) and EU Space Programme.
• NESRA Rapid EO Assessment v1 (NESRA EO dashboard).

४. तथ्याङ्क मिलान टिप्पणी — किन संख्या फरक हुन्छन्

फरक निकाय र समयका संख्या सधैँ प्रत्यक्ष तुलनायोग्य हुँदैनन्। NESRA असंगत तथ्याङ्क जोड्दैन। फरकका कारण:

• फरक रिपोर्ट समय (जस्तै 06:00 प्रहरी बनाम 09:00 NDRRMA);
• निकायगत सूची (NDRRMA, प्रहरी) मिलान क्रममा;
• फरक परिभाषा (फेला परेका शव बनाम मृत्यु; सम्पर्कविहीन बनाम बेपत्ता);
• नेपाल दायरा बनाम सीमापार संयुक्त संख्या — नेपालका संख्या अलग राखिन्छन्;
• विदेशी नागरिक सम्पर्कविहीनको उपसमूह, थप गणना होइन;
• निकायगत उद्धार (सेना/प्रहरी/APF) राष्ट्रिय जोडको उपसमूह हुन्।

सीमापार सन्दर्भ। अन्तर्राष्ट्रिय रूपमा रिपोर्ट भएका संयुक्त नेपाल–तिब्बत संख्या नेपालका भन्दा ठूला छन्। यो संक्षेपले नेपालका संख्या मात्र दिन्छ।

६. आवागमन तथा पूर्वाधार

• पृथ्वी राजमार्ग (मुग्लिङ–काठमाडौं): 30 अगस्टमा त्रिशूली कटानले कृष्णभीर (बेनीघाट रोराङ, धादिङ) मा सडक आधार भत्काई अवरुद्ध गर्‍यो; सफाइ क्रममा अत्यावश्यक सवारीका लागि आंशिक/एकतर्फी आवागमन। यात्रा अघि ट्राफिक प्रहरीसँग पुष्टि गर्नुहोस्।
• धुन्चे: काठमाडौं–टोखा–कालिकास्थान हुँदै वैकल्पिक हलुका सवारी मार्ग खुला, जोखिमपूर्ण खण्डमा सावधानी।
• मुख्य रसुवा मार्ग: बेत्रावती–रसुवागढी / टिमुरे–स्याफ्रुबेसी गम्भीर क्षतिग्रस्त, अन्त्यसम्म बन्द; रसुवागढी सीमा मार्ग खुलेको छैन।
• पूर्वाधार: करिब 40 km सडक र 41 पुल नष्ट/क्षतिग्रस्त रिपोर्ट; व्यापक ~42 Bailey पुल आवश्यकता 10 लामो Bailey पुल (~70 m) को तत्काल पहलभन्दा अलग। यी माग हुन्, जडान भइसकेका होइनन्।

भौतिक अवस्था (संरचनाको स्थिति) र आवागमन (आधिकारिक रूपमा खुला/बन्द) अलग देखाइन्छ।

७. NESRA पृथ्वी अवलोकन — Rapid EO Assessment v1

NESRA Rapid EO Assessment v1 सार्वजनिक छ। यो बादल-सीमित Sentinel-2 flood/debris-path तथा exposure मूल्याङ्कन हो (तस्बिर 27 अगस्ट 2026)। NESRA को अन्तिम प्रमाणित बाढी विस्तार वा क्षति मूल्याङ्कन अझै प्रकाशित छैन।

• 101.6 km नदी मूल्याङ्कन (92 km मापन; 4.1 km घना बादलमुनि)।
• 3,216 भवन, 11.5 km मुख्य सडक र 62 पुल नक्साङ्कित मार्गसँग intersect।
• Exposure प्रमाणित क्षति होइन; बादलमुनिको क्षेत्रलाई अप्रभावित नबुझ्नुहोस्।

पृथ्वी अवलोकन विश्लेषण नेतृत्व: Michael Hylind, NESRA EO Lead।

८. बाह्य पृथ्वी अवलोकन

International Charter (activation 1052): अब 8 बाह्य उत्पादन — Rasuwa pre/post र mudflow/rockflow extent, Nuwakot pre/post, Timure–Syabrubesi impact map। यी बाह्य उत्पादन हुन्, NESRA को विश्लेषण होइन।

Copernicus EMS (EMSR927): धेरै क्षेत्रमा द्रुत नक्साङ्कन उत्पादन जारी। यसको नक्साङ्कित Syapru Besi क्षेत्रमा Copernicus EMS ले 240 भन्दा बढी भवन नष्ट र 32 क्षतिग्रस्त रिपोर्ट गरेको (WorldView-3, 27 अगस्ट 2026)।

तथ्याङ्क नमिलाउनुहोस्। Copernicus का संख्या निश्चित क्षेत्रको बाह्य निष्कर्ष हुन्, NESRA का होइनन्; NESRA को 3,216 (exposure ≠ क्षति) सँग तुलनायोग्य होइनन्।

९. पुनर्लाभ तथा पुनर्निर्माण

प्रतिकार्य पुनर्लाभतर्फ सर्दैछ। Post-Disaster Needs Assessment (PDNA) / विस्तृत क्षति मूल्याङ्कन तयारीमा छ। सरकारले करिब USD 4–5 billion प्रारम्भिक पुनर्निर्माण आवश्यकता उल्लेख गरेको छ।

प्रारम्भिक मात्र। यो प्रारम्भिक अनुमान हो, अन्तिम क्षति संख्या होइन।

१०. मुख्य जानकारीका कमी

• सम्पर्कविहीन सूची मिलान र शव पहिचान (DNA/फोरेन्सिक)।
• बाँकी माथिल्लो अवरोध र भिरालो/पहिरो स्थिरता।
• सडक पुनर्स्थापना/आवागमन समयरेखा (पृथ्वी राजमार्ग/कृष्णभीर; मुख्य रसुवा मार्ग)।
• सुरुङ/जलविद्युत् उद्धार र पुनर्स्थापना।
• घाइतेको समेकित आधिकारिक संख्या।
• अन्तिम क्षति मूल्याङ्कन (PDNA)।
• NESRA EO को अन्तिम प्रमाणित विस्तार र YIL geospatial उत्पादन।