Preliminary technical report on the 26 August 2026 Bhote Koshi–Trishuli–Narayani flood — Nepal CHWRR | Publicly Available Data Resources for the 2026 Nepal Glacier-Related Hazard Cascade

Resource details

Summary: Official preliminary technical report with event chronology, station information, warning actions and provider-estimated discharge/volume. The listing calls it preliminary; the document title calls it technical. Numerical values remain attributed estimates, without independent reproduction.
Review findings: Automated source screening and metadata/technical assessment. Resource eligibility, independent human screening and manuscript inclusion remain unassigned. No component-specific open redistribution licence was established. Public access is separate from permission to republish observations or document contents. This catalogue publishes metadata and source links only.
Record type: Official Event Report
Provider role: Official Producer Or Document Host As Documented
Original language: Nepali
English title: Under review
First identified: 8 September 2026
Geographic coverage: Nepal
Temporal coverage: 26 August 2026 event
Collection licence: Under review
Redistribution: Metadata And Links Only; Third-Party Bodies Retained Privately For Research Provenance.
Source record: Open the source record
Metadata sources: Source 1: hydrology.gov.np
Source 2: hydrology.gov.np

Inventory

All 1 asset metadata records have been assessed. 1 have flagged follow-up. Read the screening method and findings.

Listed assets: 1
Provider-stated total: No stable dataset-total size assigned; individual HTTP response sizes are documented separately.
Assets naming another contributor: 0
Confirmed reachable without registration: 1 of 1
Unavailable endpoints: 0

Listed assets

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Preliminary technical report on the 26 August 2026 Bhote Koshi–Trishuli–Narayani flood — Nepal CHWRR

Not stated as a stable downloadable dataset size; recorded HTTP sizes are in the assessment.PDF

Open source asset

Listed contributor

Centre for Hydrology and Water Resources Research, Water and Energy Commission Secretariat, Government of Nepal

Classification

Data Or Data Bearing Product

Event Analysis

Data candidate · Metadata assessed 8 September 2026

Reachable without registration · Direct Open · checked 8 September 2026

Resolve inconsistent station labels and indices, obtain the source rating curve and uncertainty before combining stage and discharge estimates.
Clarify the time interval and integration convention behind CHWRR’s reported total/excess volumes: their baseline difference implies four hours at 2,600 m³/s, while the printed interval is 14:10–18:00. Retain the report’s values as attributed estimates.
Establish the intended reuse terms with the original producer before redistributing this component; an accessible public URL does not establish an open licence.

Screening findings and extracted metadata

Automated metadata and technical review. Resource eligibility and manuscript inclusion are separate decisions.

Inspection basis: Metadata And Structure Reviewed
Temporal assessment: Event Analysis
Provider: Centre for Hydrology and Water Resources Research, Water and Energy Commission Secretariat, Government of NepalSource Recorded · source · Native station service or document masthead; host and original publisher distinguished
Publication date stated by the source: Not statedSource Recorded · source · Listing date or document date; not an observation date
Linked file format: PDFObserved Structure · source · Source metadata
HTTP response size: 1048330Observed Http · source · Bytes in this recorded HTTP response; a station-page size is not a time-series size
Licence identifier: Not stated
Rights statement: No component-specific open redistribution licence was established. Public access is separate from permission to republish observations or document contents. This catalogue publishes metadata and source links only.Review Assessment · source · Source metadata
File coordinate system: Not stated
File pixel spacing: Not applicable to this asset role
Source bounds (west, south, east, north): Not applicable to this asset role
Source identifier: publications:37Source Recorded · source · Source metadata
Original listing title: २०८३ भोटेकोशी-त्रिशूली-नारायणी बाढी” सम्बन्धि प्रारम्भिक प्रतिवेदनSource Recorded · source · Source metadata
Document pages: 9Source Recorded · source · Source metadata
Original publisher: Centre for Hydrology and Water Resources Research, Water and Energy Commission Secretariat, Government of NepalSource Recorded · source · Source metadata
Distribution host: hydrology.gov.npSource Recorded · source · Source metadata
Bulletin issue time as labelled: Not stated
Actual dissemination time: Not stated
Date stated inside the document: BS 2083 Bhadra 10; event and preparation date on page 1. PDF creation timestamp is separately retained.Source Recorded · source · Source metadata
Unresolved station identities: Report page 5 Rasuwagadhi index 446.42 versus live station 4913 index 446.22. Page 1 labels an 08:40 last reading as Bhote Koshi Syabrubesi but uses 6/7 m thresholds also found at live Rasuwagadhi. Source names are not silently reconciled.Conflicting Source Metadata · source · Report pages 1 and 5; run 041 station metadata
What the warning chronology establishes: Agency-reported message/observation chronology; issued messages do not establish individual receipt, comprehension or evacuation. No causal travel-time model fitted.Source Recorded · source · Source metadata
Source stage–discharge relationship: Not stated
Discharge estimates reported by CHWRR: The report estimates a peak of approximately 5,850 m³/s at Devghat around 16:00 and assumes a base flow of 2,600 m³/s. These are attributed report values, not an independently reproduced discharge series.Provider Reported Estimate · source · Technical report, page 4; numeric components remain separately available in the metadata export
Water-volume estimates reported by CHWRR: For 14:10–18:00, the report estimates 57.40 million m³ total water and 19.96 million m³ above its assumed base flow. The underlying rating curve and uncertainty were not established.Provider Reported Estimate · source · Technical report, page 4; no catalogue recalculation
Unresolved volume-integration interval: The reported total minus excess volume is 37.44 million m³. At the stated constant base flow of 2,600 m³/s this represents four hours, whereas 14:10–18:00 spans three hours and fifty minutes. The integration interval or convention requires clarification; the original reported values are retained.Derived Interpretation Of Source Report · source · Technical report, page 4; arithmetic relationship among printed figures, not recalculation from observations
Source observation start: Not stated
Source observation end: Not stated

Official preliminary technical report with event chronology, station information, warning actions and provider-estimated discharge/volume. The listing calls it preliminary; the document title calls it technical. Numerical values remain attributed estimates, without independent reproduction.
No component-specific open redistribution licence was established. Public access is separate from permission to republish observations or document contents. This catalogue publishes metadata and source links only.
Automated metadata/structure assessment; no independent scientific validation or human eligibility decision.

Download screening decisions · Download all metadata and field sources

Catalogue details

Original source title: २०८३ भोटेकोशी-त्रिशूली-नारायणी बाढी” सम्बन्धि प्रारम्भिक प्रतिवेदन
Asset reference: acand_53499284-f692-56e7-8d47-065a69846b6a
Host / aggregator: hydrology.gov.np
Relationship to record: Official preliminary technical report with event chronology, station information, warning actions and provider-estimated discharge/volume. The listing calls it preliminary; the document title calls it technical. Numerical values remain attributed estimates, without independent reproduction.
Upstream source: Centre for Hydrology and Water Resources Research, Water and Energy Commission Secretariat, Government of Nepal
Upstream evidence: Source service or masthead assessed; independent validation not performed.
Dataset family: Preliminary technical report on the 26 August 2026 Bhote Koshi–Trishuli–Narayani flood — Nepal CHWRR
Acquisition date: Not stated
Spatial resolution: Not applicable; station point or document, not a raster grid
Access result: Reachable without registration on 8 September 2026
Provenance: Conflicting information
Rights: Under review — No component-specific open redistribution licence was established. Public access is separate from permission to republish observations or document contents. This catalogue publishes metadata and source links only.
Redistribution: Metadata And Links Only; No Third-Party Bodies Published.
Production method: Automated metadata and bounded source-structure assessment. Source request history and actual coverage are retained.

Evidence: source 1 · source 2