NPO法人 The Groundwater Project は，2020年ストックホルム水大賞を受賞したジョン・チェリー博士が主催しています。
活動は，すべての人が無料で高品質の地下水教材を利用できるようにすることが目的で，既に多くの教材がダウンロードできるようになっています。
※ジョン・チェリー博士は，1979年に出版された地下水の教科書とされる，Dr. Allan Freeze／Dr. John Cherry「Groundwater」の筆者です。本書も Books for You からダウンロード可能です。
The Groundwater Project
https://gw-project.org/
Books for You
https://gw-project.org/books/
●BASIC PRINCIPLES (in suggested reading order for visitors new to groundwater topics)
1．Groundwater in Our Water Cycle (in English[Updated:27 February 2022],Turkish and Catalan)
2．Hydrogeologic Properties of Earth Materials and Principles of Groundwater Flow
[Updated:29 December 2020]
3．Conceptual and Visual Understanding of Hydraulic Head and Groundwater Flow[Released:20 October 2020]
4．Graphical Construction of Groundwater Flow Nets (in English[Updated:10 January 2021] and Spanish)
5．Groundwater Storage in Confined Aquifers[Released:10 November 2020]
6．Groundwater-Surface Water Exchange[Updated:03 October 2020]
7．Groundwater Velocity[Updated:27 December 2020]
8．Introduction to Isotopes and Environmental Tracers as Indicators of Groundwater Flow
[Updated:18 December 2020]
9．Flux Equations for Gas Diffusion in Porous Media[Updated:09 February 2022]
10．Groundwater Microbiology[Updated:03 February 2022]
●APPLYING PRINCIPLES
1．Groundwater Resource Development[Updated:10 November 2020]
2．Septic System Impacts on Groundwater Quality[Updated:03 August 2021]
3．Hydrogeology and Mineral Resource Development[Updated:04 April 2021]
4．Geologic Frameworks for Groundwater Flow Models (in English[Updated:11 October 2021] and Portuguese)
5．Managed Aquifer Recharge: Southern Africa[Released:23 July 2021]
6．Land Subsidence and its Mitigation[Released:10 August 2021]
7．A Conceptual Overview of Surface and Near-Surface Brines and Evaporite Minerals
[Updated:11 January 2022]
8．Fluoride in Groundwater[Released:11 January 2022]
9．Electrical Imaging for Hydrogeology[Released:18 January 2022]
10．Domestic Wells ／Introduction and Overview［Released:16 March 2022］
11．Water Well Record Databases and Their Uses[Released:16 March 2022]
●CLASSIC BOOKS
1．Groundwater (in English, Portuguese and Turkish)
2．Dense Chlorinated Solvents and other DNAPLs in Groundwater
3．Analysis and Evaluation of Pumping Test Data (2nd Edition, completely revised)
●CHILDREN'S BOOKS
1．Wally & Deanna's Groundwater Adventure... to the Saturated Zone
(in English, Spanish, Greek, Chinese, French, Indonesian, Hausa, Hungarian, Afrikaans and Urdu)