时隔65年，东莞再新建中型水库

Core Viewpoint - The Daxi Water Huai De Reservoir expansion project in Dongguan, part of the Pearl River Delta water resource allocation project, aims to address water resource shortages and improve water supply security in the region, with a total investment of 1.796 billion yuan and an expected annual allocation of 38 million cubic meters of water from the Xijiang River after completion [4][6][9]. Group 1: Project Overview - The Daxi Water Huai De Reservoir expansion project officially broke ground on December 29, 2025, with a planned construction period of 45 months [1][6]. - The project is designed to enhance Dongguan's dual water source system, improve water infrastructure, and strengthen water security [1][4]. - The total investment for the project is 1.796 billion yuan, and it is expected to allocate approximately 38 million cubic meters of Xijiang water annually upon completion [6][9]. Group 2: Strategic Importance - The Pearl River Delta water resource allocation project is a national major water conservancy project aimed at solving water shortages in Shenzhen, Dongguan, and Guangzhou, while providing emergency water sources for Hong Kong and Panyu District [4][5]. - The project addresses the imbalance between water resource distribution and economic development in Dongguan, which faces challenges such as insufficient water supply during dry periods and water pollution [4][5]. - The expansion project is a significant step in Dongguan's "15th Five-Year" water network construction and marks the first new medium-sized reservoir built in Dongguan in 65 years [9][10]. Group 3: Engineering Details - The expansion will involve the reconstruction of the main dam, raising the normal water level to 88.0 meters, and merging the existing reservoirs into a single medium-sized reservoir with a total capacity of 40.69 million cubic meters [8][9]. - The project includes the construction of a new main dam, two auxiliary dams, and supporting structures, significantly enhancing flood control capabilities [8][9]. - The reservoir will serve multiple purposes, including water supply, irrigation, flood control, and emergency water supply, thereby improving the overall resilience of Dongguan's water supply network [9].