Đánh giá khả năng áp dụng giải pháp thoát nước đô thị bền vững tại khu vực đang đô thị hóa ở huyện Bình Chánh, thành phố Hồ Chí Minh

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Nguyễn Xuân Quang Châu, Văn Hòa Hồ, Văn Tấn Lưu, Ngọc Hoàng Giang Ngô, Thị Mai Lan Nguyễn, Đức Dũng Trần

Ngôn ngữ: vie

Ký hiệu phân loại: 628.2 Sewers

Thông tin xuất bản: Khi tượng thủy văn, 2021

Mô tả vật lý: 49-64

Bộ sưu tập: Metadata

ID: 497625

Thêm vào giỏ

Quá trình đô thị hóa và tác động của biến đổi khí hậu là một trong những nguyên nhân gây ra tình trạng ngập lụt cục bộ. Nghiên cứu này nhằm đánh giá khả năng áp dụng giải pháp thoát nước đô thị bền vững (SUDS) ở khu vực đang đô thị hóa, huyện Bình Chánh. Nghiên cứu sử dụng mô hình EPA-SWMM để mô phỏng 2 kịch bản áp dụng SUDS: KB1 (Tăng khả năng lưu trữ tạm thời để tái sử dụng nước mưa) và KB2 (Làm giảm lưu lượng đỉnh của dòng chảy), xây dựng bộ tiêu chí kết hợp với khảo sát 30 hộ dân, 10 chuyên gia và chính quyền địa phương để đánh giá khả năng áp dụng SUDS. Kết quả mô phỏng kịch bản đã mang lại hiệu quả giảm ngập đáng kể: KB1 với thời gian ngập giảm 2,68% và tổng lượng ngập giảm 0,52%
KB2 với thời gian ngập giảm 22,85% và tổng lượng ngập giảm 17,24%. Dựa trên mức độ phù hợp với bộ tiêu chí và kết quả khảo sát các bên liên quan cho thấy, vỉa hè thấm và vườn mưa được đánh giá phù hợp với khu vực nghiên cứu nhất, tiếp theo là hệ thống thu nước mưa và cuối cùng là mái nhà xanh. Nghiên cứu kết luận SUDS giúp giảm ngập đáng kể và nên được áp dụng để góp phần hỗ trợ công tác quản lý rủi ro ngập lụt đô thị hiệu quả hơn.The uncontrolled urbanization and the situation of climate change are one of the causes of local inundation. This study aims to evaluate the applicability of the Sustainable urban drainage solution (SUDS) in the urbanizing area, Binh Chanh district. The Storm Water Management Model (EPA-SWMM) is used to simulate two scenarios for applying SUDS solutions: The scenario of increasing temporary storage capacity for reuse rainwater (Scenario 1) and reducing peak discharge of stormwater runoff (Scenario 2), design SUDS selection criteria combined with a survey of 30 households, 10 experts and local government to assess the applicability of SUDS. The simulation results of the scenario have brought about a significant flood reduction effect: Scenario 1 with flooding time decreased by 2,68%, and the total flood volume was reduced by 0,52%, and scenario 2 with flooding time decreased by 22,85%, and the total flood volume was reduced by 17,24%. Furthermore, based on the suitability with the proposed SUDS selection criteria with the survey of stakeholders, our results indicate that the porous pavements and rain gardens solutions were the most popular and suitable for the study area, followed by the rainwater harvesting finally the green. The study results indicate that the SUDS have a significant flood reduction effect, supporting urban flood risk management more efficiently.

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