Land Cover Changes and Landslide Risk in Sri Lanka

An urban heat island (UHI) is a phenomenon that shows a higher temperature in urban areas compared to surrounding rural areas due to the impact of impervious surface (IS) density, and other anthropogenic activities including changes of land use/land cover (LULC). The purpose of this research is to examine the spatiotemporal land-use/land-cover changes and their impact on the surface UHI (SUHI) in Kandy City, Sri Lanka, using Landsat data and geospatial techniques. LULC classification was made by using a pixel-oriented supervised classification method, and LULC changes were computed by using a cross-cover comparison. The SUHI effect was discussed mainly through the variation of land-surface temperature (LST) over persistent IS and newly added IS. The study showed the dynamics of each LULC and its role in the SUHI. The results showed that IS areas expanded from 529 to 1514 ha (2.3% to 6.7% of the total land area) between 1996 and 2006, and to 5833 ha (23.9% of the total land area) in 2017, with an annual growth rate of 11.1% per year from 1996 to 2006 and 12.2% per year from 2006 to 2017. A gradually declining trend was observed in forest areas. Persistent IS reported the highest mean LST areas compared to newly added IS. The mean LST difference between persistent IS and newly added IS was 1.43 °C over the study period. This is because areas of persistent IS are typically surrounded by IS even in their neighborhoods, whereas areas of newly added IS occur at the edges of the city and are, therefore, cooled by the surrounding nonurban surfaces. This calls for appropriate green-oriented landscape-management methods to mitigate the impact of the SUHI in Kandy City. The findings of the study showed that LULC changes and their effect on the SUHI from 1996 to 2017 made a significant contribution to long records of change dynamics.

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Analysis of land cover changes in the past and the future as contribution to landslide risk scenarios

Applied Geography ◽

10.1016/j.apgeog.2014.05.020 ◽

2014 ◽

Vol 53 ◽

pp. 11-19 ◽

Cited By ~ 43

Author(s):

C. Promper ◽

A. Puissant ◽

J.-P. Malet ◽

T. Glade

Keyword(s):

Land Cover ◽

Landslide Risk ◽

Land Cover Changes ◽

The Past ◽

Risk Scenarios ◽

The Future

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Policy Instruments for NBS to Landslide Risk Management in Urban Areas in the Hilly Areas of Sri Lanka

ECONOMICS AND POLICY OF ENERGY AND THE ENVIRONMENT ◽

10.3280/efe2018-002006 ◽

2019 ◽

pp. 113-133

Author(s):

Priyanka Dissanayake ◽

Federica Ranghieri

Keyword(s):

Risk Management ◽

Sri Lanka ◽

Urban Areas ◽

Policy Instruments ◽

Landslide Risk

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Analisis Longsor Cililin Dan Model Pengupayaan Kestabilan Lerengnya

Jurnal Sains dan Teknologi Indonesia ◽

10.29122/jsti.v16i3.3419 ◽

2019 ◽

Vol 16 (3) ◽

Author(s):

Wisyanto

Keyword(s):

Land Cover ◽

Risk Reduction ◽

Disaster Risk Reduction ◽

Disaster Risk ◽

Landslide Risk ◽

West Java ◽

Water Condition ◽

Reduction Program ◽

Landslide Risk Reduction

Landslides have occurred in various places in Indonesia. Likewise with West Java, there were many regions that has experienced repeated landslides. Having many experience of occurrences of landslides, we should have had a good landslide risk reduction program. Indeed, the incidence of landslides depends on many variables. Due to that condition, it may that a region would have different variable with another region. So it is impossible to generalize the implementation of a mitigation technology for all areas prone to landslides. Research of the Cililin's landslide is to anticipate the next disasters that may happen in around the area of 2013 Cililin Landslide. Through observation lithological conditions, water condition, land cover and landscape, as well as consideration of wide dimension of the building footing, the distance of building to the slopes and so forth, it has been determined some efforts of disaster risk reduction in the area around the landslide against the occurrence of potential landslide in the future.Bencana tanah longsor telah terjadi di berbagai tempat di Indonesia. Demikian halnya dengan Jawa Barat, tidak sedikit daerahnya telah berulang kali mengalami longsor. Seharusnya dengan telah banyaknya kejadian longsor, kita mampu mengupayakan program penurunan risiko longsor secara baik. Memang kejadian longsor bergantung pada banyak variabel, dimana dari satu daerah dengan daerah yang lain akan sangat memungkinkan mempunyai variabel yang berbeda, sehingga tidak mungkin kita membuat generalisasi penerapan suatu teknologi mitigasinya untuk semua daerah rawan longsor. Penelitian longsor di Cililin dilakukan untuk mengantisipasi terjadinya bencana di sekitar daerah Longsor Cililin 2013 yang lalu. Melalui pengamatan kondisi litologi, keairan, tutupan lahan dan bentang alam yang ada, serta pertimbangan akan dimensi luas pijakan bangunan, jarak batas bangunan dengan lereng dan lain sebagainya, telah ditentukan beberapa upaya penurunan risiko bencana di daerah sekitar longsor terhadap potensi kejadian longsor dimasa mendatang.Keywords: Landslide, risk reduction, footing of building, Cililin

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