Đánh giá hiện trạng hệ thống công trình thủy lợi và khả năng đáp ứng nhu cầu nước của các hồ chứa trong bối cảnh biến đổi khí hậu tại huyện Tri Tôn và Tịnh Biên, tỉnh An Giang

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Tác giả: Trần Gia Thịnh Huỳnh, Vương Thu Minh Huỳnh, Hải Trí Lê, Huy Khanh Lương, Quốc Luật Nguyễn, Thị Trúc Ly Trần, Văn Tỷ Trần

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khí tượng Thủy văn, 2022

Mô tả vật lý: tr.42-56

Bộ sưu tập: Metadata

ID: 334718

Thêm vào giỏ Liên kết toàn văn

Mục tiêu của nghiên cứu này là đánh giá khả năng đáp ứng nhu cầu dùng nước của các hồ chứa trong bối cảnh biến đổi khí hậu (BĐKH) tại huyện Tri Tôn và Tịnh Biên, tỉnh An Giang. Để đạt được mục tiêu trên, trước tiên hiện trạng hệ thống công trình thủy lợi được đánh giá
trữ lượng nước từ các hồ chứa và nhu cầu nước của các ngành dùng nước theo các kịch bản BĐKH trong giai đoạn 2030 và 2050 được tính toán
từ đó khả năng cung cấp nước từ hồ chứa cho các ngành dùng nước được đánh giá. Kết quả cho thấy, trong năm 2020, khu vực nghiên cứu có 07 hồ chứa (trong đó 01 hồ chứa lớn, 04 hồ chứa vừa và 02 hồ chứa nhỏ), trữ lượng nước hồ chứa năm 2020, 2030 và 2050 lần lượt là 2,55×106 m3
4,35×106 m3
và 5,86×106 m3. Nhu cầu dùng nước trong 06 tháng (mùa khô) theo hai trường hợp (TH) ở các năm 2030 và 2050 và tương ứng với ba kịch bản BĐKH lần lượt là 5,2×106 m3 và 6,2×106 m3 (RCP2.6), 5,2×106 m3 và 5,8×106 m3 (RCP4.5), 5,2×106 m3 và 6,0×106 m3 (RCP8.5)
7,7×106 m3 và 7,9×106 m3 (RCP2.6), 8,2×106 m3 và 8,9×106 m3 (RCP4.5), 7,8×106 m3 và 8,0×106 m3 (RCP8.5). Nghiên cứu cho thấy khả năng đáp ứng nhu cầu nước cho các ngành dùng nước (%)từ hồ chứa trong 06 tháng (mùa khô) tăng dần qua từng giai đoạn do số lượng các hồ chứa ngày càng tăng. Khả năng cấp nước từ hồ chứa đạt khoảng 70% nhu cầu dùng nước tínhđến năm 2050. Nghiên cứu tiếp theo cần xem xét chi tiết vận hành hồ chứa và cập nhật số liệu BĐKH năm 2020 theo CMIP6.The objective of this study is to assess the ability to supply water for waterusing sectors from reservoirs in the context of climate change in Tri Ton and Tinh Bien districts, An Giang province. To achieve the above objective, the current state of irrigation system was first assessed
water resources from reservoirs and water demand of various water-use sectors under climate change scenarios for the periods 2030 and 2050 were calculated
thereby the ability to supply water for water-using sectors from reservoirs was assessed. The results show that in 2020, the study area has 07 reservoirs (of which 01 large, 04 medium and 02 small reservoirs), water resources in reservoirs in 2020, 2030 and 2050 are respectively 2.55×106 m3
4.35×106 m3
và 5.86×106 m3. The demand for water in 6 months (dry season) for two cases in 2030 and 2050 and corresponding to three climate change scenarios is 5.2×106 m3 and 6.2×106 m3 (RCP2.6), 5.2×106 m3 and 5.8×106 m3 (RCP4.5), 5.2×106 m3 and 6.0×106 m3 (RCP8.5)
7.7×106 m3 and 7.9×106 m3 (RCP2.6), 8.2×106 m3 and 8.9×106 m3 (RCP4.5), 7.8×106 m3 and 8.0×106 m3 (RCP8.5). The ability to supply water for water-using sectors (%) from reservoirs in 6 months (dry season) has been found to gradually increases over each period thanks to the process of investment in reservoir construction, and by 2050 will reach about 70% of water demand. Further research should consider the details of reservoir operation and update climate change data in 2020 according to CMIP6.

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