كليدواژه :
دماي رويه‌ي زمين , ماهواره موديس تررا , تحليل روند , دورسنجي , حوضه آبريز سفيدرورد
چكيده فارسي :
پهنه بندي مكاني دماي رويه ي زمين نشان داد كه دماي رويه در اين حوضه ميل به خوشه اي شدن و لانه گزيني دارد. به طوري كه در دوره گرم سال(بهار و تابستان)، گرانيگاه و ثقل افزايشي دماي رويه در بخش هاي مركزي اين حوضه كه منطبق بر مناطق كم ارتفاع و پست حوضه است، انطباق دارد و در دوره سرد سال(پاييز و زمستان)، افت محسوس دما در اين بخش ها تشديد مي شود. مجاورت بخش هاي شمالي و غربي اين حوضه با گره گاه كوهستاني شمال غرب از يك سو و همسايگي با كرانه هاي جنوبي درياي خزر و توپوگرافي البرز از سوي ديگر؛ سبب كاهش دماي رويه در دوره گرم سال و افزايش نسبي دما در دوره سرد سال شده است. همچنين نتايج آزمون روند حاكي از اين است كه درتمام ماهها، روند افزايشي معنادار در دماي رويه به ويژه در ماههاي تابستان(تير، مرداد، شهريور به ترتيب با 29/92، 11/67 و 13/47 درصد از مساحت حوضه) و در زمستان(دي، بهمن و اسفند به ترتيب با 32/35، 2727و 1/75 درصد از مساحت حوضه) كاملاً مشهود است و ماه هاي بهار و پاييز داراي روند كاهشي ناچيز در دماي رويه هستند. بيشترين ميزان روند افزايشي معنادار مربوط به ديماه و بيشترين روند منفي معنادار، از آنِ مهرماه ميباشد. به طوركلي؛ 89/5 درصد از مساحت حوضه سفيدرود، بدون روند؛ 9/22 درصد، روند افزايشي و 281درصد، روند كاهشي معنادار در دماي رويه ي زمين را به خود اختصاص داده اند.
چكيده لاتين :
Due to the growth of urbanization and migration to cities, housing supply has become an acute problem. To meet the demands for housing, in addition to providing land, capital, and building materials, a strong economic management is needed. One of the ways that has been implemented in Iran for housing and helping people to own a house is the formation of housing cooperatives, on which, with reference to Article 44 of the Constitution, more emphasis is placed in recent years to reduce government holdings and provide opportunities for participation in all economic bases.
Methodology
The research method of the present article is applied in terms of purpose and descriptive-analytical in nature. Data collection was done through library and field data gathering (interviews with experts of housing cooperatives, practitioners, and university professors through a semi-structured questionnaire using non-probabilistic sampling method (snowball)). In the present paper, the number of the informants, 30, was determined based on the cooperation conditions and the corona limitation. In this study, due to the nature of the issue based on the strategic interpretation of the drivers affecting the quality of housing cooperatives in the production of urban housing, strategy-based approaches have been used. Therefore, two important techniques, namely cross-structure analysis approach and interaction analysis approach with Mikomak software have been used.
Results and discussion
In the analysis of the strength of the relationship in the direct impact of variables, it is clear from the measurable relationships between them that there are very strong relationships among the components of "satisfaction with the efficiency of housing profits, participation of housing investment institutions, mass builders, and cooperatives in housing production, and formulating a coherent and dynamic policy of access to cheap housing of suitable quality,”and are mutually related with the component of "formulating a coherent and dynamic policy of access to cheap housing of suitable quality for cooperative members." Out of 37 factors studied in this study, 13 factors were finally extracted as key variables and drivers in the optimal performance of the cooperatives. All 13 factors were repeated in both direct and indirect methods.
Conclusion
The results show that the drivers of housing cooperatives' performance including "coherent measures to get the housing market out of recession; involvement of housing investment institutions, mass builders, and cooperatives in housing production; and satisfaction with housing efficiency" are marginalized. This trend shows that these indicators do not tend to improve, and with the current trend, the situation in the organization will continue to be unfavorable. As a result, the necessary condition for improving performance of cooperatives in the physical and spatial changes of Tabriz city based on decentralized planning and meeting the needs of all citizens in the future, is the promotion of the above indicators.
