REMOTE SENSING OF LAND SURFACE TEMPERATURE USING LANDSAT TM THERMAL INFRARED BAND

A full-scene of Landsat TM data acquired on April 17, 1988 (path 127/row 58) was used in this study. The scene covers the area of Selangor and North part of Negeri Sembilan in Peninsular Malaysia. The main objective of this study is to evaluate the use of remote sensed information, especially thermal band 6 to gain land surface temperature (LST) using thermal band of Landsta images. The result will be compared with urban and non-urban surfaces by using normalised difference vegetation index (NDVI) and the relationship between them will be analysed. The initial result showed that the correlation between the LST and NDVI over ten locations in the study area is quite significant. The derivation of LST map using remote sensing technique in this study is useful in providing information for analysing geophysical parameters over Selangor-Negeri Sembilan area, especially dealing with urban and heat island phenomenon

ESTIMATION OF LAND SURFACE TEMPERATURE USING LANDSAT TM THERMAL INFRARED IN SELANGOR-NEGERI SEMBILAN

A full-scene of Landsat TM acquired on April 17, 1988 (path 127/row58) was used in this study. This scene covers the areas of Selangor and north part of Negeri Sembilan in Peninsular Malaysia. The main objective of this study is to evaluate the use of remote sensed information, especially thermal band 6 to gain land surface temperature (LST) using thermal band of Landsat images. The result will be compared with urban and non-urban surfaces by using normalised difference vegetation index (NDVI) and compare relationships between them. The initial result showed that the correlation between the LST and the NDVI over ten locations in the study area is quite significant. The derivation of LST map using remote sensing technique in this study is useful in providing information for analysing geophysical parameters over Selangor-Negeri Sembilan area, especially dealing with the urban heat island phenomenon

A Localised Cloud Detection and Masking Method Using Spectral Analysis

In satellite remote sensing, cloud blocks surface or near surface information. The aim of this study is to investigate the spectral properties of cloud and to carry out cloud detection and masking over Malaysia based on spectral analysis. A cloud detection and masking method tuned to tropical conditions have been developed based on spectral of MODIS (Moderate Resolution Imaging Spectroradiometer) data. Thresholds were applied to three sets of spectral measurements, i.e. reflective bands, thermal bands and brightness temperature difference of thermal bands. The results show that the method was able to detect clouds over Malaysia effectively

Thermal Anomaly, Heat Index And Urban Heat Island During The Hajj Season In Saudi Arabia

The exposure of thermal anomaly within Saudi Arabia region has invariably triggers a unique climate phenomenon called heat stress and heat stroke among its inhabitants. There are an increasing number of cases associated with sudden death due to extreme heat in Saudi Arabia. In general, this study attempts to examine the changes in the thermal anomaly and the heat island phenomenon in three major cities of Mecca, Medina and Jeddah, particularly during the Hajj period by means of quantitative analyses of secondary information on climatology and MODIS remote sensing data. The study found that almost 48.3% of pilgrimage took place in summer, during which the heat index was categorized as of Extreme Danger. There was a potential existence of heat stroke within the Hajj season between the months of April to September. Local meteorological analysis had also established that Medina had experienced less extreme temperature conditions between 1982-2012 if compared to other cities. The study also found that the city of Jeddah and the city of Mecca were amongst the two main cities classified in the extreme heat wave category. Despite the minimal heat island intensity observed, the information is nevertheless essential to be integrated into any urban and regional development plans that seek to reduce the heat hazard of Saudi Arabia’s urban dwellers

Temporal Changes in Urban Green Space based on Normalized Difference Vegetation Index

This study identifies land use changes in the metropolitan region of Klang-Langat Valley focusing on urban sprawl and green space. A technique called Normalized Difference Vegetation Index (NDVI) is used to quantify temporal urban green space dynamics. All districts in the valley recorded a marked increase in urban area, but decreased in agriculture and forest areas. Result of vegetation index analysis showed that NDVI increases for water body, bare soil, and built-up area category for as much as 16.98% from 1998 to 2001, but during the same period vegetation experience a decrease of 22.25%

Kebolehupayaan sistem penuaian hujan sebagai bekalan air alternatif di Malaysia: Suatu penelitian awal

Sistem Penuaian Air Hujan dianggap sebagai Kaedah Pengurusan Terbaik atau "Best Management Practice (BMP)" yang diamalkan di Malaysia. Sistem ini bukan sahaja bertujuan untuk melambatkan aliran air larian permukaan malahan ianya juga dijadikan sebagai sumber bekalan air alternatif yang percuma dan selamat digunakan. Terdapat juga pandangan yang mengatakan sistem tersebut tidak viable dan praktikal memandangkan kos binaan dan penyelenggaraan yang terpaksa ditanggung oleh pengguna sistem berkenaan. Bagaimanapun, terdapat beberapa kajian di dalam dan diluar negara menunjukkan faktor ‘return on capital’ atau ROC bagi sistem ini hanyalah di dalam tempoh masa yang pendek, iaitu antara dua hingga tiga tahun. Artikel ini cuba meneliti tapak pelaksanaan sistem berkenaan di kampus Universiti Kebangsaan Malaysia sebagai makmal ujikaji khusus. Hasil pengoperasian sistem analisis TANGKINAHRIM (2010), telah mendapati taburan hujan yang konsisten sepanjang tahun, di samping keluasan tapak tadahan air yang besar dan mencukupi untuk kegunaan operasi pejabat di Fakulti Sains Sosial dan Kemanusiaan. Kebolehpercayaan terhadap sistem berkenaan adalah tinggi iaitu 89.3% dan didapati saiz tangki yang optimum adalah di sekitar 60 hingga 65 meter padu air yang mampu diisi. Anggaran saiz berkenaan adalah didapati bersesuaian dengan saiz tadahan, jumlah populasi (pengguna) dan juga perletakan lokasi yang strateg