Measurement the impact of migration on the spatial distribution pattern of population in rural settlements and forecasting for the year 2025 (case study: Birjand county)

Spatial distribution system of population and human settlements is a result of the performance of different environmental factors. The purpose of this paper is to assess the effects of immigration on population distribution pattern of rural settlements by entropy model and predict the trends of the Year2025. Research method of the present research is descriptive-analytical and from main object regarded as an applied research. For implementation of the research, firstly the database of rural settlement population was created in the period (1956-2005) and with statistical application software (EXEL&SPSS) classification and rate of population growth was provided and then the entropy model is used to assess the trend of balance / imbalance in the spatial distribution of the population in rural settlements. The results of the analysis on the base of entropy models showed an imbalance in the population of rural agglomerations in the rural districts of Birjand county and relative trend toward imbalances continues in the year 2025.