灌区工程规模与布局规划要点OA

As critical agricultural infrastructure,irrigation districts support the national strategy of rural revitalization by safeguarding national food security and ensuring the supply of specialty agricultural products.This paper focuses on the key issue of project scale and layout in irrigation district design,with analysis on the scoping and sizing of irrigation areas,water supply-demand analysis and allocation scheme,and water source assessment for project feasibility.In this study,the key considerations in irrigation area scoping are established based on baseline resource surveys,the rule of"defining land by water",and a multi-factor overlay analysis.Criteria are also suggested for the selection of irrigation area sizes,including prioritizing prime farmland while accommodating rural drinking water needs,feasibility assessment for each sub-area,and ensuring sustainable operation.Key points of water supply-demand balance analysis are proposed in this paper,highlighting precise and comprehensive demand forecasting,reliable and dynamically matched supply assessment,and diversified,optimized water allocation.In such an approach,the paper illustrates a multidimensional allocation mode.By source,it helps coordinate the development,utilization,and protection of surface water,groundwater,non-conventional water resources,and transferred water.By user,it balances demands and priorities across agriculture,ecology,domestic use,and industry.By space,it optimizes allocation within irrigation districts and across regions;and by time,it achieves efficient regulation of water resources between and within years.Finally,the key points of water source demonstration are summarized from the perspective of handling the relationships between local and distant sources,elevation-dependent supply options,new and old water,as well as distributed and centralized supply models.The current study aims to offer a clear,rigorous technical pathway and decision-support framework for building modern irrigation districts with appropriate scale,efficient allocation,and reliable water sources.It contributes theoretical insights and practical guidance for the scientific planning and construction of irrigation projects.