Group 1 - The current flood season poses significant challenges for flood prevention tasks in many areas, with some regions neglecting flood control efforts during small watershed management, leading to safety hazards and adverse impacts on local flood prevention work [1] - Small watershed management is a comprehensive and systematic project, where flood prevention during the flood season is crucial for the safety of people's lives and property, as well as the effectiveness and long-term stability of the entire management project [1] - Flood prevention should not be conducted in isolation but should be integrated with various measures such as water conservancy law enforcement, ecological restoration, soil and water conservation, and comprehensive water resource utilization [1] Group 2 - Small watersheds often have significant topographical variations and uneven surface coverage, leading to rapid runoff formation after rainfall, which can trigger sudden disasters like flash floods and mudslides [2] - During small watershed management, it is essential to consider the natural geographical features and historical hydrological data of the watershed to design appropriate drainage systems, flood control dams, and diversion channels [2] - Establishing and improving real-time monitoring and early warning systems for rainfall, water conditions, and disasters is crucial for timely information collection, transmission, and analysis to support emergency responses [2] Group 3 - To ensure the long-term effectiveness and systematic nature of flood prevention efforts, it is necessary to strengthen institutional frameworks and technological support [3] - A sound regulatory framework and responsibility mechanism for small watershed management should be established, clarifying the flood prevention responsibilities of various government levels, relevant departments, and social entities [3] - The introduction of modern information technologies, such as remote sensing monitoring, geographic information systems (GIS), and artificial intelligence prediction models, can enhance the scientific and intelligent level of flood prevention decision-making [3]

Core Points - The successful launch of the first shield machine "Xianxing" marks the commencement of the tunneling phase for the Chengxi South Drainage Project, a significant water conservancy initiative in Hangzhou [1] - The shield machine is approximately 90 meters long, weighs about 2500 tons, and has a diameter of 12.1 meters, designed to excavate a 5-kilometer underground tunnel [1] - The project aims to enhance flood control standards in the Chengxi area from a 20-year to a 50-year flood occurrence rate [2] Group 1 - The Chengxi South Drainage Project is crucial for addressing flood drainage deficiencies in the Chengxi region and ensuring water safety for the Hangzhou Chengxi Science and Technology Corridor [2] - The project is currently advancing across various construction segments, including vertical shaft excavation and tunnel lining works [2] - The city water service group has implemented advanced calibration and management systems to ensure the precision and efficiency of the shield machine's operation [1]

Core Viewpoint - The article discusses the severe flooding issues faced by Sanxiang Town in Zhongshan during heavy rainfall, highlighting the ongoing construction of the Maowan River flood control project aimed at alleviating these problems by 2028 [1][4][6]. Group 1: Flooding Issues in Sanxiang - Sanxiang Town has historically suffered from severe flooding due to its geographical location, which resembles a "water basin" with limited drainage channels [3][4]. - The recent heavy rainfall recorded a maximum of 214 mm in three hours, classified as a once-in-a-century event, exacerbating the flooding situation [1][3]. - The town's drainage relies heavily on the Maowan River, which has limited capacity to handle the influx of water during heavy rains [3][4]. Group 2: Flood Control Measures - The Maowan River flood control project, initiated in early 2022, consists of four phases and aims to create a comprehensive flood defense system [4][6]. - The project has already shown effectiveness, with approximately 600,000 cubic meters of water volume reduced during the recent flooding due to the construction of various flood control facilities [5][6]. - The first phase of the project, which includes the expansion of drainage channels, is nearly complete, while the second phase has also made significant progress [4][5]. Group 3: Future Improvements - The total investment for the Maowan River flood control project is 4.062 billion yuan, with the completion expected by 2028 [6][10]. - The construction of the Dayongkou Pump Station is crucial for enhancing drainage capacity and is anticipated to fundamentally resolve the flooding issues caused by external tidal influences [10][12]. - The project aims to significantly improve the annual flooding conditions in Sanxiang and surrounding areas once fully operational [6][10]. Group 4: Emergency Response and Preparedness - Sanxiang Town has implemented effective emergency response measures, achieving zero casualties during the recent flooding event [13][15]. - The town's proactive approach included preemptive drainage of newly constructed flood control lakes and coordinated emergency response efforts [13][15]. - Compared to previous years, the number of affected underground parking lots and damaged vehicles has significantly decreased, indicating improved flood management [15].

Core Points - The completion of the main structure and installation of metal equipment for the Lutuan and Xinbao sluices marks a significant milestone in the ecological governance project of the Wenyu River, enhancing flood control and water resource management capabilities [1][2] - The Wenyu River ecological governance project is part of the second phase of the Wenyu River Park construction and is included in Beijing's key projects for 2024 and 2025, focusing on flood control, ecological restoration, and landscape greening [1][2] - The Wenyu River Park serves as an important flood retention area in Beijing's flood control planning, contributing to the overall flood management system in the North Canal basin [3] Project Details - The Lutuan sluice has 3 gates, while the Xinbao sluice has 7 gates, totaling 10 gates that have undergone successful testing for stability and operational efficiency [2] - The sluices will play a crucial role in regulating floodwaters and managing water resources, thereby ensuring the safety of residents and promoting sustainable water environment development [2] - The project management team has effectively coordinated design, construction, and supervision to overcome challenges such as tight schedules and complex construction environments [2] Future Management - The Beijing water authority will closely monitor water conditions during the flood season to ensure optimal operation of the sluices, providing robust support against extreme weather events during peak flood periods [2]