Grantee name: deltares USA INC.grant number: G22AC00597-00PROJECT title: USGS non-competitive assistance FY 2023 - sacramento acquisition branchproject period: 10 01 2023 - 09 30 2024PROJECT title:…

The U.S. Geological Survey (USGS) awarded a $250,000 Cooperative Agreement to Deltares USA Inc., a non-profit research institute in Silver Spring, Maryland, under the USGS Research and Data Collection program (CFDA 15.808). The purpose of the grant is to support the development, implementation, and improvement of models and methods to accurately represent water and subsurface resources for predicting water availability and use. Key deliverables include:

1. Providing senior-level software architecture expertise to aid the design, review, and mentorship of USGS and Deltares teams in enhancing the performance and functionality of parallel computing capabilities for MODFLOW-6, the USGS groundwater modeling platform. 2) Collaborative development of a one-dimensional Richards equation formulation suitable for large-scale regional hydrological applications. 3) Technical support and maintenance services for the MODFLOW-6 enterprise ecosystem of integrated water resource models. 4) Public dissemination of research findings through a peer-reviewed journal article.

The award period is from October 1, 2023 to September 30, 2024, with the goal of advancing modeling tools and techniques to improve predictions of water availability across temporal and spatial scales.

Grantee name: deltares USA INC.grant number: G22AC00597-00PROJECT title: USGS non-competitive assistance FY 2023 - sacramento acquisition branchproject period: 10 01 2023 - 09 30 2024PROJECT title: developing, implementing, and improving models and methods to accurately represent waterand subsurface resources relevant for predicting water availability and use concerns.budget period: 10 01 2023 - 09 30 2024AWARD purpose the proposed research is part of a larger project aimed at developing an enterprise ecosystem of integrated and interoperable models and or model codes that, when linked through one or more model coupling frameworks, provide a flexible representation of water availability suitable for addressing WMA programmatic needs, broader modeling needs, and or external stakeholder, partner, and agency needs. Implemented models in the ecosystem will be considered the best available science for each respective water availability component including the states of the water cycle, water uses, water-quality constituents, and hydroecological conditions. MODFLOW6 is providing the initial framework which the ecosystem of codes models will be coupled with, and intimate knowledge of this code is imperative. Parallelization solutions will be developed using interoperable components and modern software engineering techniques as part of this project to enhance the execution time of existing numerical models problems and provide an ability to compute larger and more resource intensive problems. These software solutions will be documented and implemented that inevitably will improve models and methods that accurately and rapidly represent advanced, consistent approaches for forecasting hydrologic states, fluxes, and outcomes for water availability to improve predictions of water availability at a range of temporal and spatial scales. Additionally, the capacity of an interoperable design allows models of federal, academic, non-governmental organizations, and private partners to connect and integrate.activities to be PERFORMED1.provide a senior level software architect familiar with enterprise capacity software (modflow 6) development to aid with design, review ongoing development efforts, and provide mentorship to USGS and deltares team members.2.continue collaborative parallel developmenta.enhance the performance and functionality of parallel capabilities.b.implement windows distribution strategies for petsc solver.c.evaluate feasibility of parallelizing the IMS solver and implement, if feasible.3.collaborative development of one-dimensional richards equation formulation appropriate for large-scale regional applications.4.provide deltares staff to assist with maintenance and support of enterprise capacity software (modflow 6). Deliverables and expected outcomesdeltares USA will deliver support for enterprise ecosystem of integrated and interoperable models to complete the buildout of the system thus permitting the statewide application of the modeling system.deltares USA will deliver public dissemination of knowledge via a peer reviewed article.intended beneficiary(IES) all persons concerned will benefit from the public dissemination of knowledge via the peer reviewed journal article.