Khai thác bền vững nước dưới đất dải cồn cát ven biển Bắc Trung Bộ: Nhu cầu dùng nước và khả năng đáp ứng của các thấu kính nước nhạt

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Tác giả: Thành Công Nguyễn, Văn Quang Trần, Đình Hùng Vũ, Ngọc Quỳnh Vũ

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ Thủy lợi, 2023

Mô tả vật lý: tr.17

Bộ sưu tập: Metadata

ID: 380436

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This paper is to continue the paper tiled “Sustainable exploitation of groundwater in sand dunes along the coast of North Central region: 1. Natural groundwater resources and exploitable reserves”. The paper presents the results of another analyzing study on the water demand and capable supply of freshwater lens for domestic and production activities in sand dunes along the coast of North Central region. The findings show that, considering the whole region, exploitable groundwater reserves of freshwater lens has been able to meet water demand of domestic use for long-term manner. Concretly, with population increasing rate practiced during recent 2015-2019 period, the estimated domestic water demand of the year 2035 is of 83,598 m3/day (including 15,661 m3/day exploited for production in the region in 2017), which is still far below (31.8%) the exploitable water reserves (263,355 m3/day). That means, there will be exists 179,757 m3/day (68.2% the exploitable water reserves) available for production activities in the region. However, analyzing by each freshwater len revealed that, even no further exploitation for production, Hoang Mai – Dien Chau freshwater len would be over-exploited early 2025 – 2030 period and over-exploitation risk will be high at Nghi Xuan and Thach Ha – Cam Xuyên freshwater lens soon after 2035Tiếp theo bài báo “Khai thác bền vững nước dưới đất dải cồn cát ven biển Bắc Trung Bộ: 1. Tài nguyên nước dưới dất và trữ lượng có thể khai thác”, bài báo này trình bày kết quả nghiên cứu nhu cầu nước nước sinh hoạt, sản xuất trong vùng và khả năng đáp ứng của các thấu kính nước nhạt ven biển này. Về tổng thể, nguồn nước trong các thấu kính đáp ứng lâu dài nhu cầu nước trong vùng. Cụ thể, giữ nguyên lượng khai thác phục vụ sản xuất hiện tại (15.661 m3/ngày), chỉ tính sự gia tăng nhu cầu nước sinh hoạt, đến 2035 nhu cầu dùng nước trên toàn vùng ước tính là 83.598 m3/ngày, thấp hơn nhiều so với tổng trữ lượng có thể khai thác (263.355 m3/ngày), bằng 31,8%. Như vậy, sau khi đáp ứng nhu cầu sinh hoạt, còn khoảng 179.757 m3/ngày (68,2% tổng trữ lượng có thể khai thác) dành cho sản xuất. Tuy nhiên, phân tích từng thấu kính chỉ ra rằng, mức độ đảm bảo biến động theo thấu kính. Chưa tính đến khai thác phục vụ sản xuất tăng thêm sau 2017, thấu kính Hoàng Mai – Diễn Châu có thể bị khai thác quá giới hạn ngay đầu những năm 2025-2030. Nguy cơ cũng có thể sớm diễn ra sau 2035 đối với thấu kính Nghi Xuân và Thạch Hà – Cẩm Xuyên

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