دانلود رایگان مقاله انگلیسی از حساسیت رانش زمین به فرکانس رانش زمین: مطالعه سطح کلان در هنگ کنگ - الزویر 2018

عنوان فارسی
از حساسیت رانش زمین به فرکانس رانش زمین: یک مطالعه در سطح کلان در هنگ کنگ
عنوان انگلیسی
From landslide susceptibility to landslide frequency: A territory-wide study in Hong Kong
صفحات مقاله فارسی
0
صفحات مقاله انگلیسی
35
سال انتشار
2018
نشریه
الزویر - Elsevier
فرمت مقاله انگلیسی
PDF
نوع مقاله
ISI
نوع نگارش
مقالات پژوهشی (تحقیقاتی)
رفرنس
دارد
پایگاه
اسکوپوس
کد محصول
E9524
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زمین شناسی
گرایش های مرتبط با این مقاله
زمین شناسی زیست محیطی
مجله
زمین شناسی مهندسی - Engineering Geology
دانشگاه
Geotechnical Engineering Office - Government of the Hong Kong Special Administrative Region (HKSAR) - Hong Kong
کلمات کلیدی
آمادگی زمين لغزش، فرکانس زمين لغزش، بارش، زمين لغزشهاي کم عمق، هنگ کنگ
doi یا شناسه دیجیتال
https://doi.org/10.1016/j.enggeo.2018.05.001
چکیده

Abstract


Rain-induced shallow landslide is the major type of landslide that happens on natural terrain in Hong Kong due to its high seasonal rainfall and deep weathering soil profile. The Geotechnical Engineering Office has been in a leading role to steer the risk management of natural terrain landslides in Hong Kong. Recently, the territory-wide rainfall-based landslide susceptibility model (in terms of landslide density per year) has been developed to predict the number of natural terrain landslides that may occur in an anticipated rainfall event. Subsequently, the storm-based landslide density has been transformed to the annual landslide frequency to compile the territory-wide landslide frequency map by incorporating the mean annual frequency of occurrence of different probable rainfall scenarios. The annual rainfall frequency of a particular rainfall scenario is derived from its return period, determined based on the abundant real-time rainfall data at a five-minute interval from 110 automatic raingauges across Hong Kong at an average density of 10 km2 /gauge. The transformation is discussed in this paper, together with the evaluation of the performance of the landslide frequency map. In addition, the potential applications of the map in Hong Kong and the pitfalls of the common evaluation methods are highlighted.

نتیجه گیری

The digital landslide frequency map building on the findings of the rainfall-based landslide susceptibility analysis has been produced using GIS technology. It is currently for internal use by the GEO to support the review of landslide susceptibility of natural terrain in Hong Kong. A number of techniques were applied to evaluate the landslide frequency map and the validation shows that the map is highly consistent with the observed data for both presence and absence of landslides. Areas for improvement are constantly identified with a view to further improving the predictability of the landslide frequency map.


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