Hydrometry data rescue, a stake for the future

Abstract

Abstract. The knowledge of past events and long-term series is a base to understand phenomena, analyze climate change and forecast future events. To increase long term series and their accuracy, NUNIEAU software, sort of ³'LJLWL]LQJ 7DEOH´ ZDV GHYHORSHG DQG GLVWULEXWHG IUHHO\ VLQFH E\ &HUHPD ,W LV DQ LQWHUQDWLRQDO UHIHUHQFH LQ WLGH gauge record, but has been improved to widespread its used for river and rainfall record. The SCHAPI (the French national service for hydrometeorology and support to flood forecasting) launched a tender to rescue the old data on rainfall and rivers available. Many improvements have been done to manage different types of rainfall charts. NUNIEAU was developed in French and is also available in English and Spanish version with collaboration of foreign institutes. Main challenge is not only to digitize old data but also assess the quality of digitized data. Protocol has been done to control the digitizing process and after to allows assessing the final quality of data.

DigiMeto: Công cụ trợ giúp đọc giản đồ tự ghi Khí tượng thủy văn

“…Trên Pluviograph, kết quả độ chính xác trên một số dữ liệu thử nghiệm đạt sai lệch 0,1778 mm (0,0152) với chế độ tự động và 0,1600 mm (0,0136) với chế độ có tương tác người dùng cuối. Công cụ NUNIEAU trong [3,4] được phát triển để số hóa giản đồ mưa một số trạm khí tượng tại Pháp. Ngoài việc hỗ trợ các module xử lý ảnh và scan thông thường, công cụ NUNIEAU hỗ trợ các giản đồ tham chiếu, để có thể so sánh, đánh giá từ kết quả số hóa giản đồ.…”

Hydrometric Data Rescue in the Paraná River Basin

“…Historical hydrometric river data (e.g., water level observations) are of paramount importance for understanding past and present hydroclimate variability, predicting future changes, and assessing results from hydrological models (Potter, ). For these reasons, in continents like Europe, works were conducted to preserve and analyze such data (e.g., Bayliss et al, ; Pons et al, ). In South America, although hydrometric data have been taken in some rivers since the late nineteenth century, no or little effort was made to preserve these historical data which are mostly stored only in paper format.…”