Data and analytics · delivered in 3-7 days
PBN.LTD offers a fast, data-led diagnosis of how mountain watersheds respond to warming, built on our own SRF-SEI anchoring framework. The method has been checked against 78 watershed records in the western United States and 14406 grid points across Chinese mountain ranges, with results delivered in as little as 5 business days.
Every order needs the domain the order relates to and a short brief from you describing the watershed or region in question.
PBN.LTD provides a swift assessment of how mountain watersheds are likely to react to a warming climate. Our SRF-SEI anchoring framework looks at watershed sensitivity to heat and flags whether a catchment is nearing what we call an anchor switch, a shift in its seasonal flow behaviour.
Conventional hydrology tends to ask where the water originates. Our approach instead considers how the seasonal pattern of flow within a watershed is set to shift as temperatures rise.
Two watersheds with almost identical SRF values, 0.384 against 0.377, can still show markedly different system sensitivities, a distinction that conventional source-partitioning methods miss but our framework picks up.
The framework is grounded in Ou's 2024 EarthArXiv preprint, which explores how snow dependence shapes warming-driven seasonal extremization within mountain watershed systems. Testing has covered 78 watersheds across the western United States and 14406 grid points in Chinese mountain regions, with out-of-sample prediction reaching a correlation of -0.405 at a significance level of 0.014.
Delivery within 5 business days.
This service is intended for academic and research reference only. It does not amount to a legally valid hydrological survey or water-resource assessment, and should not be used for engineering approval, water-resource argumentation or final insurance pricing. Findings should be checked against local field observations.
We can screen a large number of watersheds within a week and highlight the fraction needing closer study, working faster than traditional hydrological methods. Rather than asking how much snow water exists, we ask how the system is likely to behave as warming continues. We see this as complementary to detailed hydrological modelling rather than a replacement for it.
Your order opens its own thread here the moment it is paid, and everything about that order - questions, changes and the final report - happens in it.
Turnaround varies by package: the Single Watershed Quick Diagnosis takes 3 business days, the Single Watershed Full Diagnosis takes 5 business days, and the Batch Watershed Screening (10+ watersheds) takes 10 business days. A faster option, cutting 2 days from the schedule, can be added for $30.
To begin, please share: 1. the watershed's coordinate range or a USGS station ID; 2. confirmation that the report is for internal research use only; 3. your preferred format, either PDF alone or PDF plus Excel. If you lack exact coordinates, simply tell us the watershed's name and rough location and we will set the boundary and check it with you before starting work.
No. The report is meant for academic and research reference only and does not carry the standing of a legally valid hydrological survey or water-resource assessment. It should not be used for administrative approval, engineering initiation, water-resource argumentation or final insurance pricing. For a legally valid report, please consult a licensed hydrological survey body.
We draw solely on public datasets, including the CNRD v1.0 Natural Runoff Dataset from the National Tibetan Plateau Data Center, the China Long-Term Snow Depth Dataset, NASA POWER, and the USGS National Water Information System. These are model-simulated or reanalysis-based gridded records rather than field measurements, which suits pre-screening and sensitivity ranking, though final decisions should be checked against local observations.
If the delivered report does not meet your expectations, reach out within 7 days and we will amend it based on your feedback at no additional charge. Where the concern relates to interpretation or methodology, we will walk through our reasoning and add further context. Refund requests are reviewed individually, and since this is a bespoke analysis service, a refund is not guaranteed once the report has been delivered.
Our data coverage is centred on China, through the CNRD and snow-depth datasets, and the United States, through USGS NWIS. For watersheds elsewhere, NASA POWER climate data can be used, though we would first need to check whether streamflow and snow-depth records are available. Please message us with the watershed's location before ordering so we can confirm whether a meaningful diagnosis is possible.
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