Đánh giá chất lượng nước Búng Bình Thiên bằng chỉ số WQI tích hợp với GIS và Viễn thám

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Vi Thiên Vũ Nguyễn, Trường Khanh Phan, Thị Hồng Ngọc Trần

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khí tượng Thủy văn, 2023

Mô tả vật lý: tr.51-64

Bộ sưu tập: Metadata

ID: 338071

Thêm vào giỏ Liên kết toàn văn

Búng Bình Thiên là khu bảo tồn đất ngập nước thuộc huyện An Phú, tỉnh An Giang. Những năm gần đây nước bên trong Búng luôn bị tù đọng, ô nhiễm. Nghiên cứu được thực hiện nhằm mục đích đánh giá chất lượng nước của Búng và kiến nghị cho người dân vùng nghiên cứu về biện pháp sử dụng nước. Có 21 vị trí được thu thập phía trái, giữa và phải dọc theo chiều dài của Búng qua hai đợt khảo sát vào mùa mưa 2020 và mưa khô 2021. Mỗi vị trí cách nhau 700m. Tổng cộng có 42 mẫu được thu thập để phân tích các thông số pH, DO, COD, NH4+–N, PO43–, Chlorophyll–a và tổng Coliform. Các mẫu nước được đánh giá bằng chỉ số WQI. Kết quả nghiên cứu chỉ ra rằng nước trong Búng có dấu hiệu nhiễm Phosphate và vi sinh không sử dụng được cho mục đích sinh hoạt. Hơn nữa, kết quả cũng chỉ ra rằng hàm lượng Chlorophyll–a cao nhất ở vị trí bên trái dọc theo chiều dài của Búng và ở cuối Búng. Chỉ số NDVI có mối quan hệ tuyến tính với Chlorophyll–a theo phương trình y = 3.5106x2 + 8.3298x + 0.601 với hệ số tương quan R2 = 0,89, trong đó y = Chlorophyll–a, x = NDVI. Các bản đồ lớp phủ trong và xung quanh Búng cũng được thành lập bằng kỹ thuật Viễn Thám giúp cho chúng ta có cái nhìn trực quan về chất lượng nước trong hồ thông qua sự phân bố thực vật và chlorophyll–a.Bung Binh Thien lake is a wetland conservation area in An Phu district, An Giang province. In recent years, the water in Lake has always been stagnant and polluted. The study was carried out for the purpose of assessing the water quality of Lake and making recommendations to the people of the study area on water use measures. There are 21 sites collected on the left, middle and right of Lake along the length of Lake through two times surveys in the rainy season 2020 and dry rainy season 2021. Distance of Each site is 700m. A total of 42 samples were collected for analysis of pH, DO, COD, NH4+–N, PO43–, Chlorophyll–a and total Coliform parameters. All water samples were assessed by using the WQI index. Research results showed that the water in lake has signs of phosphate contamination and is unusable for domestic purposes. Furthermore, the results also indicated that the Chlorophyll–a content was highest at the left side along the length of the Lake and at the end of the lake. The NDVI index has a linear relationship with Chlorophyll–a according to the equation y = 3.5106x2 + 8.3298x + 0.601 with correlation coefficient R2 = 0.89, where y = Chlorophyll–a, x = NDVI. The vegetable cover maps in and around lake were also established by the Remote Sensing technique, which gives us a visual view of the water quality in the lake through the distribution of vegetation and chlorophyll–a.

1. Đọc trực tuyến

1. Đọc trực tuyến

Tạo bộ sưu tập với mã QR