{"id":889,"date":"2026-08-20T18:20:17","date_gmt":"2026-08-20T09:20:17","guid":{"rendered":"https:\/\/rusutsu-sustainable.com\/?p=889"},"modified":"2026-08-20T18:20:18","modified_gmt":"2026-08-20T09:20:18","slug":"field-testing-groundwater-sensors-and-lorawan-communication","status":"publish","type":"post","link":"https:\/\/rusutsu-sustainable.com\/?p=889&lang=en","title":{"rendered":"Field Testing Groundwater Sensors and LoRaWAN Communication"},"content":{"rendered":"\n

Challenges Identified for Continuous Monitoring<\/strong><\/h2><\/div><\/section>\n\n\n\n

To continuously understand groundwater conditions, it is not enough simply to install wells and sensors. A reliable environment is also needed to transmit and store the data collected.<\/p>\n\n\n\n

The Rusutsu Water Cycle Project uses LoRaWAN, a low-power, long-range wireless communication technology, to build a system for remotely collecting data such as water levels and rainfall.<\/p>\n\n\n\n

During Phase 2, we checked the operational status of sensors installed at each observation site, as well as their communication links to the LoRaWAN gateway.<\/p>\n\n\n\n

At Izumikawa Well No. 1, the installed water-level sensor was not returning accurate readings, so we replaced it with a different sensor.<\/p>\n\n\n\n

When we tested the removed sensor in a pool, it returned readings that generally corresponded to the water depth up to 61 cm. Beyond that depth, however, it consistently returned a fixed value of 108 cm, regardless of the actual water depth.<\/p>\n\n\n\n

These results indicate that the device is unsuitable for monitoring groundwater levels in deep wells. However, it may be reusable in applications with a limited measurement range, such as shallow rivers.<\/p>\n\n\n\n

We also confirmed that, in the Izumikawa area, the water-level sensors were functioning but could not communicate with the existing gateway.<\/p>\n\n\n\n

In mountainous areas, terrain, forests, and buildings can obstruct communications. As the number of observation sites increases, it becomes difficult for a single existing gateway to cover every sensor.<\/p>\n\n\n\n

To understand groundwater conditions across the entire region, additional LoRaWAN gateways will be needed in areas with a high density of sensors.<\/p>\n\n\n\n

A system is also needed to allow on-site staff to directly check sensor operating status, the time of the last transmission, measurement values, and communication errors from a smartphone or computer.<\/p>\n\n\n\n

This field inspection was more than simply an equipment-installation task. It was an important effort to identify the technical challenges involved in maintaining stable, long-term monitoring in Rusutsu\u2019s demanding natural environment.<\/p>\n\n\n\n

The main tasks planned for Phase 2 included checking observation wells, rain gauges, the LoRaWAN communication environment, data collection, and web integration.<\/p>\n","protected":false},"excerpt":{"rendered":"

To continuously understand groundwater conditions, it is not enough simply to install wells and sensors. A rel […]<\/p>\n","protected":false},"author":1,"featured_media":854,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jinr_url_youtube":"","_jinr_pip_youtube":false,"_jinr_time_youtube":"","_jinr_thumb_youtube":"","_jinr_media_youtube":"","_jinr_category_edit":false,"_jinr_category":"","_jinr_title_display":false,"_jinr_snsbutton_display":false,"_jinr_ads_display":false,"_jinr_thumbnail_display":false,"_jinr_profile_display":false,"_jinr_representations_display":false,"_jinr_relatedpost_display":false,"_jinr_sidebar1col_display":false,"_jinr_sidebar2col_display":false,"_jinr_seotitle_display":"","_jinr_description_display":"","_jinr_keyword_display":"","_jinr_hastag_display":"","_jinr_canonical_display":"","_jinr_noindex_display":false,"_jinr_paidpost":false,"_jinr_paidpost_product_id":"","_jinr_headtag_article":"","footnotes":""},"categories":[42,70],"tags":[],"class_list":["post-889","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-activity-reports-en","category-water-monitoring-en"],"views":"","_links":{"self":[{"href":"https:\/\/rusutsu-sustainable.com\/index.php?rest_route=\/wp\/v2\/posts\/889","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rusutsu-sustainable.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rusutsu-sustainable.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rusutsu-sustainable.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rusutsu-sustainable.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=889"}],"version-history":[{"count":1,"href":"https:\/\/rusutsu-sustainable.com\/index.php?rest_route=\/wp\/v2\/posts\/889\/revisions"}],"predecessor-version":[{"id":890,"href":"https:\/\/rusutsu-sustainable.com\/index.php?rest_route=\/wp\/v2\/posts\/889\/revisions\/890"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rusutsu-sustainable.com\/index.php?rest_route=\/wp\/v2\/media\/854"}],"wp:attachment":[{"href":"https:\/\/rusutsu-sustainable.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=889"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rusutsu-sustainable.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=889"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rusutsu-sustainable.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=889"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}