ارزیابی فعالیت‌های انسانی در حوزه آبخیز (مطالعه موردی: حوزه آبخیز لاله‌زار کرمان)

نوع مقاله : مقاله پژوهشی

نویسنده

استادیار، دپارتمان علوم زمین، مرکز تحقیقات بین المللی بیابان، دانشگاه تهران

چکیده

پویایی فعالیت‌های انسانی، پایداری سامانه‌های پشتیبانی زندگی جهانی را تهدید می‌کند. تحلیل داده‌های تحولات انسانی نقش محوری در ارزیابی مشکلات محیط‌زیستی ایفا می‌کند. این مطالعه با هدف تجزیه و تحلیل فعالیت‌های انسانی در حوزه آبخیز انجام شده است. مطالعات و تجزیه و تحلیل‌ها نشان داد که متغیرهای تحول انسانی شامل نوع، شدت و روند مداخله انسان است. الگوهای فضایی و زمانی نوع فعالیت (کاربری سرزمین)، شدت و روند دخالت انسان با استفاده تصاویر ماهواره و بازدیدهای صحرایی مورد مطالعه قرار گرفتند. طبقه‌بندی و نقشه‌ کاربری سرزمین در دو مرحله انجام شد. فاز عملکردی، شامل کاربری‌های اصلی زمین از جمله کشاورزی، مرتع، شهری و منابع آب و فاز فعالیت، شامل ده نوع کاربری زمین بود. مطالعه شدت مداخلات انسان در واحدهای کاربری سرزمین، بر اساس گسترش زمانی توسعه زمین‌های کشاورزی (کاربری کشاورزی)، ارزیابی وضعیت مرتع (کاربری مرتع) و وسعت تحت تاثیر بودن سرزمین (کاربری شهری و منابع آب) انجام شد. نتایج مطالعات کاربری سرزمین نشان داد که اراضی مرتعی 2/77 درصد و کاربری‌های کشاورزی، محدوده شهری و منابع آب به ترتیب 5/21، 1/1 و 2/0 درصد را به خود اختصاص داده اند. نتایج روند مداخلات نشان داد که روند از شرایط طبیعی به سمت جایگزینی ساختارهای با فعالیت‌های انسان ساخت ادامه دارد. روند دخالت انسان ، رشدی از فعالیت کشاورزی در اراضی مرتعی و همچنین از دست‌رفتن زیاد زمین‌های زراعی را در رشد ناهمگن شهری و صنعتی، نشان داده است. نتایج مطالعه، سازگاری بین سه متغیر تغییر و تحول انسانی نوع، شدت و روند دخالت انسان را نشان می‌دهد.

کلیدواژه‌ها


عنوان مقاله [English]

Evaluation of human activities in the watershed (Case study: Lalehzar watershed, Kerman)

نویسنده [English]

  • Naser Mashahadi
Assistant Professor, Geo Science Dept., International Desert Research Center (IDRC), University of Tehran
چکیده [English]

The dynamics of human activities threaten the sustainability of global life-support systems. Analyze of anthropogenic transformation data play a central role in environmental problems evaluation. This study aims to analyze human activities in watershed. Studies and analyzes revealed that the anthropogenic transformation variables include the type, intensity and trend. Spatial and temporal patterns of the type of activity (land use), intensity and human intervention were studied using satellite images and field observation. The classification and land use map were done in two phases: The functional phase included the main land uses including agriculture, rangeland, urban and water resources, and the activity phase included ten types of land use. The study of the human interventions intensity in land use units was carried out based on the temporal extension of agricultural land development (agricultural land use), the rangeland condition assessment (rangeland land use) and the area extent of under influence (urban area and water resources). The results of land use studies identified that Rangeland lands cover 77.2 percent and agriculture, urban area and water resources land uses accounted for 21.5, 1.1 and 0.2 percent, respectively. The results of the intervention trend indicated that the trend continues from normal conditions to the replacement by technogenous structures. This trend has revealed growth of agricultural activity in rangeland and as well as the tremendous loss in cropland in uneven urban and industrial growth. The results of the study show the compatibility between the three variables of anthropogenic transformation; ie, the type, intensity and trend.

کلیدواژه‌ها [English]

  • Intervention trend
  • Intensity of intervention
  • Land function
  • Land use
  • Agriculture
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دوره 75، شماره 1
خرداد 1401
صفحه 119-136
  • تاریخ دریافت: 21 بهمن 1400
  • تاریخ بازنگری: 04 اردیبهشت 1401
  • تاریخ پذیرش: 07 اردیبهشت 1401
  • تاریخ اولین انتشار: 01 خرداد 1401