Boundary Layer Characteristics over Aindanda Low-Mountain Pass of Kathmandu Valley, Nepal

• DOI: 10.3126/jist.v20i2.13944
• Publication Date: 2015-11-26T14:58:41Z
• Authors: Saraswati Shrestha; Sajan Shrestha; Sangeeta Maharjan; Ram P. Regmi
• Keywords: Hydraulic jump; Westerlies; Diurnal temperature variation; Limiting

The early monsoon time boundary layer characteristics prevailing over Aindanda low-mountain pass of Kathmandu valley has been continuously monitored for the period 11 to 24 June 2013. study reveals that channels regional air masses from western neighboring up into as westerly/ northwesterly winds during daytime whereas it drains mass out night-time. speed westerly/northwesterly wind often exceeds 6.5 ms-1 late afternoon. Nighttime mixing height (MLH) was highly fluctuating with an average around 300m MLH suppressed limiting in between 290-450m above ground part day but reduced 210-270m Comparison diurnal variation at central area floor strongly suggests intruding through this is a cool density flow weakly stratified mixed valley. structure channeled indicates possibility making hydraulic jump valley, particularly, afternoon time.Journal Institute Science and Technology, 2015, 20(2): 22-30