Projek penyelidikan tahun akhir ini mengulas permasalahan pada ciri-ciri
kejadian angin kencang di kawasan utara Malaysia. Bulan Oktober tahun 2014 dipilih
bertepatan dengan tempoh di mana kejadian puting beliung dilaporkan telah
merosakkan harta benda di daerah Pendang, Kedah. Kajian ini dijalankan bertujuan
untuk menentukan kesan kelajuan angin dan arah angin pada bulan tertentu yang
menyumbang kepada kejadian angin kencang. Data angin yang dikumpul telah diproses
dan diinterpolasi untuk menghasilkan peta kelajuan angin dan peta arah angin bertiup
menggunakan perisian GIS-Idrisi. Keputusan daripada analisis peta, kelajuan angin
yang tertinggi dicatatkan adalah 3.1 m/s pada 4 Oktober 2014 di stesen meteorologi
Butterworth. Sementara itu, stesen Pulau Langkawi dan Chuping masing-masing
mencatatkan kelajuan angin terendah iaitu sebanyak 0.3 m/s pada 10 Oktober dan 23
Oktober 2014. Peta kelajuan angin dan arah angin yang diplot jelas menunjukkan
wilayah angin bertiup, di mana arah tiupan angin ditunjukkan oleh anak panah dan
halaju angin diwakili oleh warna-warna yang berterusan. Keputusan yang diperolehi
turut membolehkan peta kontur dihasilkan pada peta negeri-negeri utara Malaysia.
Perhubungan statistik antara kelajuan dan arah angin diilustrasikan melalui carta garis,
peta raster dan gambar rajah rose angin yang menunjukkan kelajuan dan arah angin.
Hasil kajian ini adalah penting bagi menunjukkan kepentingan kelajuan dan arah angin
dalam merekabentuk struktur bangunan yang mengambil kira rintangan angin kencang.
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This final year research project reviews the problem on the characteristics of the
strong winds occurrence in the northern region Malaysia. The specific month i.e.
October 2014 was selected that coincides with the period where the tornado outbreak
was reported to damage properties in Pendang district, Kedah. The study was intended
to determine the effect of the wind speed and wind direction on that specific month that
contributes to the strong wind occurrences. The wind data collected were processed and
spatially interpolated to produce wind speed and wind direction map using GIS-IDRISI
software. From the map analysis, the highest wind speed recorded was 3.1 m/s on the
4th October 2014 at Butterworth meteorological station. Meanwhile, Pulau Langkawi
and Chuping stations have recorded the calmest wind speed of 0.3 m/s on 10th October
and 23rd October respectively. The plotted wind speed and wind direction maps were
able to show clearly the territory of the wind blows, where directions are shown by
arrows and the wind velocity represented by continuous colours. The results have also
produced contoured wind map within the northern region Malaysia. The spatial
statistics determines the relationship of wind speed and wind direction and the results
were illustrated using line charts, raster wind speed maps and the wind rose diagram
represents the wind direction. The outcomes of the study are essential in showing the
importance of wind speed and direction parameters in the design of building structures
that consider resistance to intense wind.
Spatial analysis on strong winds occurrence in the northern regionmalaysia based on interpolated wind speed and wind direction map / Ruzainah Ahmad Taufik