| Summary: | Mining sand resources from rivers is now prevalent practice, particularly in the state of
Perak, and may result in the destruction of public assets as well as repercussions or
increased stress on commercial and noncommercial living resources that rely on these
places. This study was conducted to estimate the effect of sand mining effect on current
Sg. Perak morphology based on on-site fieldwork and spatial analysis. The Acoustic
Doppler Current Profiler (ADCP) was utilized to project the river profile in this
investigation. The ADCP could swiftly profile vast river cross-sections, enhance data
accuracy in sediment transport studies and measure the total discharge of a specific crosssection.
The Van Veen Grabber and Helley Smith sediment samplers gather bed soil
samples and determine sediment transport. These methods are used to determine the
appropriateness of available sand material and the flux of sediment transport on a small
scale. The surveys and analysis of the collected data showed that 80% of the grab
samples were good-quality sand. In 2020, Pendiat's riverbed eroded between 28.51 m
and 36.57 m, while sand was deposited between 11.49 m and 72.76 m. Only three places
on Teluk Kepayang indicate erosion ranging from 8.26 to 58.81 meters. The rest data
indicate the addition of a riverbank within the range 14.03-m-to-72.53-m. Pendiat's
islands are predicted to grow 1 to 9% per month, but Teluk Kepayang's PG island would
shrink 5% by March 2020. Pendiat's sandbank is 0.3577 ha to 1.8833 ha, whereas Teluk
Kepayang's is 0.7152 ha to 1.1465 ha. The study area's sand mining operations do not
meet guidelines. Due to limited sediment movement, river depth, water flow, riverbank
erosion, and island enlargement altered the adjacent hydraulic system. The sand company
must also provide a bore log profile to calculate how much river sand can be extracted.
The pump and Pontoon approach is optimal for sand dredging since it reduces riverbank erosion and maintains water quality. These guidelines and on-site analysis will be used
for design evaluation and sediment monitoring removal activities in streams.
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