Abstract:
Statistics from hourly wind speed collected between 1960 and 2020 from 12 meteorological stations in the Hexi Corridor indicate that the western region of the corridor is located in an intermediate-to-high wind energy environment, whilst the eastern region is located in a low wind energy environment. Variation rules of annual average wind speed, probability of sand-driving wind, and drift potential differ between eastern and western regions of the corridor. WeibullCum distribution function is universally applicable to express annual cumulative probability distribution of hourly wind speeds at various meteorological stations. Interannual variation of constant term
B in WeibullCum function exhibits periodic fluctuation, while
C and
D show a decreasing trend. The prediction equations of cumulative probability distribution function of wind speed are then established for eastern and western regions of Hexi Corridor, respectively. It is observed that prediction equations have high accuracy for annual average wind speed and sand-driving wind probability, whereas simulated drift potential is in overall less than the actual results. Actual statistical results from 2021 to 2024 further confirm the above conclusions. Wind variations exhibit distinct cycles in eastern and western regions of the Hexi Corridor. In the next 10 years, it is expected that peak values for annual average wind speed and sand-driving wind probability will occur around 2025 in the eastern region, but later than 2030 in the western region.