Xác định thời kỳ vận hành kiểm soát lũ lưu vực Sông Cả

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Tác giả: Văn Quy Lê, Thị Hồng Linh Lưu, Đức Thiện Trần

Ngôn ngữ: Vie

Ký hiệu phân loại:

Thông tin xuất bản: Khoa học Biến đổi khí hậu 2023

Mô tả vật lý: 66-72

Bộ sưu tập: Metadata

ID: 410213

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Tóm tắt
Chủ đề

Lưu vực Sông Cả thuộc vùng khí hậu Bắc Trung Bộ, mùa lũ trên lưu vực được phân hóa khá khác nhau giữa các vùng và có xu hướng xuất hiện muộn, ngắn dần từ Bắc xuống Nam. Bài báo này sử dụng phương pháp phân cấp, phân kỳ lũ tại các trạm thủy văn điển hình bao gồm các trạm Cửa Rào, Nghĩa khánh, Dừa, Nam Đàn, Hòa Duyệt để xác định được thời kỳ lũ khác nhau giữa các vùng bao gồm thời kì lũ sớm, lũ chính vụ và lũ muộn trên lưu vực Sông Cả, từ đó đề xuất thời kì vận hành của các hồ chứa trên lưu vực Sông Cả trong việc tham gia cắt, giảm lũ hạ. Kết quả tính toán cho thấy trạm Cửa Rào có thời kỳ lũ sớm 48 ngày, lũ chính vụ 61 ngày và lũ muộn 44 ngày
tại trạm Nghĩa Khánh thời kỳ lũ sớm 79 ngày, lũ chính vụ 74 ngày và lũ muộn 15 ngày
tại trạm Dừa thời kỳ lũ sớm 50 ngày, lũ chính vụ 98 ngày và lũ muộn 25 ngày
tại trạm Nam Đàn thời kỳ lũ sớm 50 ngày, lũ chính vụ 109 ngày và lũ muộn 24 ngày
tại trạm Hòa Duyệt thời kỳ lũ sớm 69 ngày, lũ chính vụ 90 ngày và lũ muộn 24 ngày., Tóm tắt tiếng anh, The Ca river basin is located in the North Central Coast climate. Therefore, the flood season in the basin is differentiated among regions and have a tendency on later appearance with a shorter duration from North to South. The paper has applied the classification and divergence method of floods at typical hydrological stations including Cua Rao, Nghia Khanh, Dua, Nam Dan, and Hoa Duyet to identify different flood periods including early floods, main floods, and late floods. This is the proposed basis for the operation mechanism of reservoirs in the Ca River basin in the reduction of downstream floods. As a result, Cua Rao station has an early flood period of 48 days, main flood period of 61 days, and late flood period of 44 days. Nghia Khanh station has an early flood period of 79 days, main flood period of 74 days, and late flood period of 15 days. Dua station has an early flood period of 50 days, main flood period of 98 days, and late flood period of 25 days. Nam Dan station has an early flood period of 50 days, main flood period of 109 days, and late flood period of 24 days. Hoa Duyet station has an early flood period of 69 days, main flood period of 90 days, and late flood period of 24 days.

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