Đánh giá vai trò của cơ cấu lớp phủ bề mặt đô thị trong việc giảm hiệu ứng đảo nhiệt đô thị áp dụng cho khu vực Thành phố Hồ Chí Minh, Việt Nam

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Đắc Nhất Đoàn, Thị Lam Huỳnh, Thanh Nghị Lê, Thị Thu Hà Lê, Thị Thanh Thủy Lưu, Thị Ngọc Hiệp Nguyễn, Thị Thanh Thúy Nguyễn, Thị Công Chính Võ

Ngôn ngữ: vie

Ký hiệu phân loại: 333.714 Economics of land and energy

Thông tin xuất bản: Tạp chí Khoa học Kỹ thuật Mỏ - Địa chất, 2020

Mô tả vật lý: 76-85

Bộ sưu tập: Metadata

ID: 492414

Thêm vào giỏ

Đô thị hóa đang diễn ra với tốc độ chưa từng thấy trên toàn thế giới, trong đó có Việt Nam. Đảo nhiệt đô thị (UHI) là một trong những hậu quả chính của quá trình đô thị hóa. Nghiên cứu này đã điều tra và đánh giá vai trò của cơ cấu lớp phủ bề mặt đô thị sẽ ảnh hưởng đến UHI ở khu vực đô thị quận 7, thành phố Hồ Chí Minh, dựa trên việc phân tích nhiệt độ bề mặt đất (LST) liên quan đến tỷ lệ phần trăm thảm thực vật, tỷ lệ không thấm nước, tỷ lệ lớp phủ mặt nước và tỷ lệ lớp phủ đất trống. Ảnh vệ tinh Landsat 8 OLI thu được vào ngày 14 tháng 2 năm 2017 đã được sử dụng để ước tính đồng thời LST từ kênh nhiệt, còn tỷ lệ thảm thực vật, tỷ lệ phần trăm không thấm nước, tỷ lệ lớp phủ mặt nước và đất trống được chiết xuất từ các kênh đa phổ. Kết quả nghiên cứu đã chỉ ra rằng, có sự khác biệt đáng kể về LST giữa các phường trong khu vực nghiên cứu. Bề mặt không thấm đóng góp lớn nhất dẫn đến hiện tượng UHI, tiếp theo là đất trống, lớp phủ thực vật và mặt nước. Những kết quả nghiên cứu này rất hữu ích để hiểu về sinh thái đô thị cũng như quy hoạch sử dụng đất để giảm thiểu các tác động tiềm ẩn đến môi trường của quá trình đô thị hóa.Urbanization is taking place at an unprecedented rate around the world, particularly in Vietnam. One of the key impacts of rapid urbanization on the environment is the effect of urban heat island (UHI). Understanding the effects of landscape pattern on UHI is crucial for improving the ecology and sustainability of cities. This study investigated how landscape composition and configuration would affect UHI in the District 7, Ho Chi Minh City of Vietnam, based on the analysis of land surface temperature (LST) in relation to the percentage of vegetation, impervious, and water surface. Landsat 8 OLI satellite images acquired on February 14th, 2017 was used to estimate the LST from the thermal channel, while the percentage of vegetation, impervious, and water surface were extracted from multi - spectral channels. Our results indicate that there is a significant difference in LST among the wards in the study area. Impervious surfaces contribute the most to UHI, followed by bare soil, vegetative cover, and water. The research results also show that the structure of urban coverings should reach: 50% of impermeable surfaces and bare land, the remaining 50% are water and vegetation. These results are useful for understanding urban ecology as well as land use planning to minimize the potential environmental impacts of urbanization.

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