Abstract: Based on the definition and constituents of the technical requirements of the standard for ecological protection & rehabilitation in development and construction,exploration was conducted of working procedure,principles and methodology for specification and determination of such requirements.The requirements can be specified quantitatively and qualitatively.The former also involves specification of index limits,methods for calculating the index limits,reference frame,and design dependability of the indexes.Determination of requirements should follow the following procedures:(1)analyzing technical issues of the development and construction activities;(2)analyzing ecological impacts of the activities;(3)determining subjects of ecological protection and rehabilitation;and(4)determining the technical requirements of the ecological protection and rehabilitation.In determining the technical requirements,the following principles should be observed:(1)combining technical factors with economic ones;(2) reflecting different physical geographic conditions;(3)taking history into account.The following five methods can be adopted to determine the technical requirements:(1)summarize practical experience and scientific experiments;(2)use for reference related standards;(3)use for reference standards of similar nature of foreign countries;(4)conduct reasoning analysis;(5)adopt the theoretical calculation method based on the requirement for ecological quality.

Key words: development and construction, ecological protection, ecological rehabilitation, standard, technical requirement, methodology