The invention relates to the technical field of block chains, in particular to an underground
water pollution tracing method and
system based on a block chain, and the method comprises the following steps: obtaining parameters such as
permeation rate,
aquifer thickness,
water flow direction and the like, writing the parameters into a
chain structure, generating a hydrological dynamic
label, verifying
pollution direction consistency to generate a space-time
label, and screening credible nodes to generate a credible identifier. And calculating a
diffusion range to form a liability
list, and verifying emission records to generate a multi-chain evidence chain. According to the method, by recording hydrological parameters and
pollutant concentration gradient differences in real time, generating
diffusion threshold values, checking space-time consistency of
pollution diffusion paths and screening credible node data, it is ensured that
pollution source positioning and diffusion paths are accurate, a responsibility subject is determined through
sequential logic checking, and a multi-chain
mutual authentication data chain is generated; the credibility and transparency of pollution
traceability are improved, the risk of data tampering is reduced, the cross-mechanism
data sharing and cooperation efficiency is enhanced, and the completeness of a
traceability chain is ensured.