Khung đánh giá rủi ro đối với ô nhiễm nước ngầm tích hợp phương pháp hóa lý, thủy văn và điện trở suất tomografi

Jian Meng1, Kaiyou Hu2, Shaowei Wang1, Yaxun Wang1, Zifang Chen3, Cuiling Gao4, Deqiang Mao1
1School of Civil Engineering, Shandong University, Jinan, China
2Kunming Engineering Corporation Limited, Kunming, China
3Shandong Institute of Eco-Environmental Planning, Jinan, China
4Shandong Institute for Production Quality Inspection, Jinan, China

Tóm tắt

Ô nhiễm nước ngầm đã trở thành một vấn đề được quan tâm rộng rãi. Để thực hiện đánh giá rủi ro một cách đáng tin cậy, việc xác định chính xác sự phân bố chất ô nhiễm và điều kiện thủy văn là cực kỳ quan trọng. Phương pháp điện trở suất tomografi (ERT) đã trở thành một công cụ mạnh mẽ nhờ vào độ nhạy cao đối với các thông số thủy hóa, cũng như những lợi ích của nó như không xâm lấn, tính liên tục không gian và hiệu quả về chi phí. Tuy nhiên, việc tích hợp các tập dữ liệu hóa lý, thủy văn và ERT để thực hiện đánh giá rủi ro vẫn còn gặp khó khăn. Trong nghiên cứu này, chúng tôi phát triển một khung tổng quát cho việc đánh giá rủi ro bằng cách liên kết tuần tự các cuộc khảo sát hóa lý, thủy văn và ERT, đồng thời thiết lập các mối quan hệ vật lý giữa các dữ liệu này. Khung này có thể được sử dụng tại các địa điểm ô nhiễm nước ngầm và giúp xác định sự phân bố của các chất ô nhiễm. Trong nghiên cứu này, nó đã được áp dụng tại một địa điểm ô nhiễm nitơ, nơi khảo sát ERT thực địa và thông tin lỗ khoan cung cấp dữ liệu đo lường quý giá để xác thực tính nhất quán của ô nhiễm và điều kiện thủy văn. Đánh giá rủi ro được thực hiện dựa trên các kết quả đã được tinh chỉnh qua việc thiết lập mối quan hệ giữa độ dẫn điện và nồng độ chất ô nhiễm với $${R}^{2}>0.84$$ . Nguồn ô nhiễm đã được xác định và hướng vận chuyển đã được dự đoán với sự nhất quán tốt của $${R}^{2}$$ = 0.965 giữa độ cao nước ngầm mô phỏng và quan sát, điều này có thể giúp đề xuất các biện pháp chống thấm và giám sát. Nghiên cứu này do đó nâng cao độ tin cậy của đánh giá rủi ro và dự đoán thông qua sự đổi mới sáng tạo đầy kích thích trong lĩnh vực đánh giá môi trường nước ngầm.

Từ khóa

#ô nhiễm nước ngầm #đánh giá rủi ro #điện trở suất tomografi #hóa lý #thủy văn

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