As the first and critical step for construction of a wind farm

the accuracy of wind resource assessment in terms of wind conditions has a direct influence on the overall power production and profitability of the prospective wind farm. On the basis the nature of the wind

this paper summarizes the current wind resource assessment approaches in perspective of the turbulent atmospheric boundary layer flow over complex terrain. The wind resource assessment approaches can be divided into three major categories: on-site measurement

wind tunnel test and numerical modeling. More attention is paid on the sub-classifications within numerical modeling approach based on the fidelity of each evaluation mode. The theoretical foundation and applicability of each method are reviewed briefly. The advantages and limitations of each method are analyzed in detail. In the end

the trends in wind resource assessment approach for the wind site located at complex terrain are prospected and suggested according to the actual demand of the current evaluations.