نوع مقاله : مقاله پژوهشی
نویسندگان
1 رییس اداره ترازیابی دقیق و تداخل سنجی راداری، اداره کل نقشه برداری زمینی وبنیادی، سازمان نقشه برداری 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 Urmia Lake and the government decision on its restoration, attention to the effects of over-drafting ground water resources in the plains around the lake plays a critical role in the recharge and repair of the lake. Unfortunately, extra extraction of ground water resources with agricultural intention caused land subsidence in various areas of Iran. Also in the plains around Lake Urmia, the agricultural development and pressure on ground water resources caused the subsidence of a significant area of the region. In this study, a subsidence map of surrounding areas of Urmia Lake was assessed by applying combined various geodetic observations. Results show 13 subsidence areas around Urmia Lake have occurred. The maximum rate of subsidence in this area is 18.9 cm/yr. Unfortunately, 70 percent of the perimeter of the lake is subsiding. The area of this 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 watering methods should be accounted for urgently.
کلیدواژه‌ها [English]
)
