Research in progress

Banqiao758

A primary-source research archive on the failure of the Banqiao Dam and the cascading reservoir failures across the Zhumadian region of Henan Province, China, in August 1975 — compiled in support of a forthcoming academic monograph.

In early August 1975, Typhoon Nina stalled over the upper Huai River basin and produced extreme, sustained rainfall over southern Henan Province. Over the following days the Banqiao Dam and a number of other reservoirs in the Zhumadian region failed. The event is documented in Chinese and international engineering and hydrology literature as among the most severe dam-failure disasters on record, though its scale, causes, and consequences went largely unpublicized outside specialist literature for many years afterward.

Much of what circulates about this event online repeats secondhand claims — some accurate, many exaggerated, distorted, or shaped by political agendas on more than one side — without traceable sourcing. This project takes the opposite approach: every claim published here is built outward from identifiable primary material — engineering records, meteorological and hydrological data, government and technical archives, and first-hand testimony — with its provenance stated. Where the evidence is incomplete or contested, that is stated too, rather than smoothed over. The evidentiary standard and verification methods used throughout this site are set out below.

Official Archive

Primary documents: engineering and technical reports, administrative records, meteorological and hydrological data, and contemporaneous correspondence.

Personal Records

A catalog of published personal records by reporters, engineers, administrators, and disaster-affected residents.

Media Reports

Contemporaneous domestic and international media coverage, catalogued as press material and used only once corroborated.

Data & Statistics

Rainfall and reservoir engineering data, and a sourced comparison of casualty and damage estimates across the literature.

Maps & Models

Flood-extent maps, dam design drawings, reservoir cascade schematics, and hydraulic models.

The Book

Status and progress notes on the academic monograph this site supports.

Sources & Methodology

This section states the evidentiary standard the rest of the site is held to. It exists because the public record on this event is unusually polluted: decades of official silence, followed by a mix of foreign press speculation, advocacy writing, and viral secondhand retellings, have left the topic with very few claims that are both specific and verifiable. This project would rather publish less, slowly, than repeat a number or a story it cannot trace to a source.

How sources are ranked

1. Primary engineering and technical records — dam design and construction documents, hydrological survey data, post-failure engineering investigations, and reservoir operation records.
2. Contemporaneous meteorological and hydrological data — rainfall and river-flow records from the period, and later peer-reviewed hydrological analyses that reprocess that raw data.
3. First-hand testimony — interviews with survivors, engineers, and former local officials, collected directly for this project under the consent and anonymization protocol described below.
4. Government and administrative archives — internal records, correspondence, and reports from the relevant period and its aftermath.
5. Peer-reviewed academic literature — used where it engages directly with (1)–(4) and shows its own sourcing; treated more cautiously where it does not.
6. Contemporary and later press accounts — used only where corroborated by one of the above, and always flagged as press reporting rather than primary fact.

Claims that exist only in secondary retellings — with no traceable origin in (1)–(4) — are not presented on this site as established fact. Where such a claim is widely repeated but unverifiable, that will be noted explicitly rather than left unaddressed, particularly on the Data & Statistics page, where casualty and damage figures are the most contested part of the record.

Provenance on every item

Every document, photograph, data point, and interview excerpt published here will carry:

• Source — where it came from (repository, collection, or interview subject).
• Date — of the original material, not of its publication here.
• Language and translation notice — most primary material is in Chinese; translations are the researcher’s own unless stated otherwise.
• Confidence notes — anything uncertain about authenticity, transcription, or interpretation.

Interview ethics

Interview subjects, and in some cases their family members, may face personal or professional risk from being publicly associated with this topic. Subjects are given the choice to be identified, partially identified, or fully anonymized (referred to by a coded identifier rather than a name), and identifying details are withheld whenever a subject requests it. Consent is sought explicitly for any material published on this site, separately from consent to be interviewed at all.

Rights & reuse

Much of this project’s underlying material consists of scanned published books, gazetteers, and government-affiliated compilations. Publishing full scans of copyrighted works on a public website is not something this project does, regardless of research purpose. Material is instead handled by tier:

• Reproduced in full — only material that isn’t copyrightable to begin with: Chinese laws, regulations, and official orders (excluded from copyright under PRC Copyright Law Art. 5), and factual data extracted from a source and re-presented in this project’s own tables (facts themselves are never copyrightable, only their original expression).
• Quoted — short, specific excerpts needed to support a specific claim, always with a full citation, under fair-use/reasonable-quotation principles — not extended to whole chapters or documents.
• Cited only — a full bibliographic citation and, where one exists, a link to a legitimate access point (library catalog, publisher, or lending service), with no file hosted here.
• Restricted — material still under copyright that isn’t reducible to the categories above stays out of public distribution. It may be described and cited, and made available to other researchers on request via Contact, but is not published as a downloadable file.

Every entry in the Official Archive carries a rights status noting which of these applies, so a reader always knows why something is — or isn’t — available to download here.

Corrections

This is a working archive maintained alongside an active research project, and it will contain gaps and, at times, errors. If you can point to a misattribution, a mistranslation, or a claim that needs a better source, see Contact. Corrections are tracked and, where they change a published claim, noted on the relevant page.

This is a working archive

Material is added as it is located, digitized, translated, and verified — much of the underlying research is still in progress. If you hold documents, imagery, or testimony relevant to this event, or you find an error on this site, see Contact.