Vietnam Subnational Rainfall: 10-Day Indicators and Anomalies

This climate dataset provides dekadal rainfall indicators for Vietnam's subnational administrative units, generated by the World Food Programme using CHIRPS v2 satellite-station data. It tracks nine specific metrics including 10-day rainfall totals, rolling 3-month averages, and percentage anomalies across a recurring forecast and observation cycle.

Use Cases

• Assessing regional drought severity using the 3-month rainfall anomaly percentage (r3q)
• Planning irrigation schedules based on 10-day rainfall forecasts (rfh) and long-term averages (rfh_avg)
• Analyzing historical precipitation trends by comparing current dekadal totals (rfh) against long-term averages (rfh_avg)

Strengths

• Includes Pcode references for standardized subnational mapping
• Combines satellite imagery with in-situ station data via CHIRPS v2
• Provides 10-day, 1-month, and 3-month rolling anomalies for trend analysis

Limitations

• Satellite-derived precipitation estimates may have biases in mountainous regions
• Statistical confidence varies by unit size as indicated by the n_pixels column

Provenance

Source

World Food Programme (WFP)

Collection Method

Satellite imagery (CHIRPS) blended with station data and GEFS forecasts.

Freshness

Updated multiple times per month following a specific 10-day forecast and observation cycle.

Geography

Vietnam