Responding to the Hunga Tonga-Hunga Ha’apai Volcanic Eruption

By Ahi Saipaia, Ministry of Agriculture, Food and Forest Tonga

Read the original article

Context

In January 2022 the Hunga Tonga-Hunga Ha’apai submarine volcano erupted. Ash clouds from the eruption and the subsequent tsunami damaged croplands on the Tongatapu and Ha’apai island groups.

mapping-farms

Croplands damaged after Hunga Tonga-Hunga Ha’apai eruption.

Activities

Analysis of Tonga Crop Survey Data

Ministry of Agriculture, Food, and Forests staff used the Tonga Crop Survey data, which was collected using the maplandscape workflow in the months before the eruption, to perform an initial estimate of damage to the food supply.

Monitoring of the agricultural recovery

The maplandscape workflow uses QField for mobile data collection. QField has full online and offline modes; this enabled Ministry staff to conduct damage mapping activities and conduct surveys to monitor how government resources for recovering croplands were being used while the countries internet was cut off. The internet cable to Tonga was severed during the eruption. In particular, QField was used to generate maps of where fields had been cleared and re-ploughed using government support. The eruption severed the undersea cable which connected Tonga to the internet.

Damage assessment with community leaders

In the months following the eruption, Ministry staff used maplandscape to interview community leaders in areas affected by the eruption to ascertain loss and damage to croplands, harvested crops, and agricultural infrastructure. This information was used to compute amounts for relief payments.

mapping-farms

Trees damaged after Hunga Tonga-Hunga Ha’apai eruption.

Outputs

View the original post

QField is the leading professional fieldwork app used in enterprise settings for efficient geospatial data collection and management. As a Digital Public Good, QField not only excels in enterprise and professional applications but also contributes significantly to advancing at least six of the United Nations Sustainable Development Goals (SDGs), promoting a more sustainable and equitable future.

Stay in the loop

Subscribe to our newsletter and stay up to date on the latest and greatest!

Open-source

QField is released under the GNU Public License (GPL) Version 2 or above. Developing QField under this license means that you can inspect and modify the source code and guarantees that you will always have access to a QGIS based field data collection app that is free of cost and can be freely modified.

Privacy

View the QField Privacy Policy to learn what information is collected, used and how we protect this.

Credits

QField, QFieldCloud and QFieldSync are developped by OPENGIS.ch. OPENGIS.ch offers consulting, development, training and support for open-source software including QField, QGIS and PostGIS.