نوع مقاله : مقاله پژوهشی
نویسندگان
1 رییس اداره ترازیابی دقیق و تداخل‌سنجی راداری، اداره کل نقشه‌برداری زمینی و بنیادی، سازمان نقشه‌برداری کشور.
2 معاون اداره کل نقشه برداری زمینی و بنیادی، سازمان نقشه برداری کشور.
3 اداره کل نقشه برداری زمینی و بنیادی، سازمان نقشه برداری کشور
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Considering the critical situation of the Urmia Lake and the decision made by the government on its restoration, attention should be given to the effects of over-exploitation of the ground water resources in the plains upstream the lake plays a critical role in recharging and restoring the lake. In various areas of Iran, over-extraction of ground water resources for agricultural purposes caused land subsidence. Similarly in the plains around Lake Urmia, the agricultural development and pressure on ground water resources caused the subsidence of a significant area in the region. In this study, a subsidence map of the Urmia Lake’s surrounding areas was assessed by applying combined various geodetic observations. Results showed that there are 13 subsidence areas around Urmia Lake. The maximum rate of subsidence in these areas is 18.9 cm/yr and unfortunately 70 percent of the perimeter of the lake is subsiding. The area of subsidence is about 4000 square kilometers. Considering the subsidence hazards to water and soil resources of the region, ground water resource management, optimal cultivation pattern performance and modern irrgation methods should be accounted for urgently.
کلیدواژه‌ها [English]
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