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Hydraulic conductivity study in engineered soil media for stormwater runoff treatment in bioretention facility / Husna Takaijudin

Hydraulic conductivity study in engineered soil media for stormwater runoff treatment in bioretention facility_ Husna Takaijudin_A9_2017_MYMY
Kaedah konvensional sistem perparitan seolah-olah tidak mencukupi untuk memenuhi air larian permukaan bandar akibat peningkatan populasi bandar yang mendadak. Ia adalah terhad kepada pendekatan struktur yang berkaitan dengan pengaruh hidraulik dan hidrologi. Oleh itu, pendekatan ini telah beralih kepada pendekatan yang lebih holistik dengan mengambil kira keperluan alam sekitar. Pindaan garis panduan Manual Saliran Mesra Alam Malaysia (MSMA) pada tahun 2012 telah diperkenalkan pada bersesuaian dengan amalan semasa untuk menangani isu-isu air ribut bandar dan subbandar. Biopenyimpanan adalah amalan yang digalakkan yang menerapkan proses semula jadi, mengintegrasikan pengetahuan sains dan kejuruteraan hidrologi, hidraulik dan alam sekitar ke dalam satu sistem. Kajian ini bertujuan untuk menyelidik interaksi antara parameter hidraulik tanah terutamanya keberaliran hidraulik tepu (Ksat) dan prestasi olahan kualiti air dan penentuan Ksat sebagai penanda aras berdasarkan prestasi biopenyimpanan. Set data komprehensif yang diperlukan untuk kajian ini telah diperolehi daripada beberapa siri ujian makmal standard, kajian kolum yang direkabentuk dan penyiasatan lapangan. Bagi tujuan ini, tiga (3) kolum tanah telah dibina di Makmal Permodelan Fizikal, Pusat Penyelidikan Kejuruteraan Sungai dan Saliran Bandar (REDAC), USM. Empat (4) konfigurasi tanah dan satu (1) parameter hidrologi telah diuji untuk kajian ruang tanah: campuran tanah kejuruteraan, kedalaman media, bahan-bahan kompos, lapisan sungkupan dan variasi aliran masuk. Kedua-dua parameter iaitu Ksat dan kepekatan bahan pencemar telah diuji bagi sampel air masuk dan air keluar untuk setiap konfigurasi tanah. Dua (2) sel biopenyimpanan bidang telah dibina dengan menggunakan keadaan olahan yang terbaik hasil daripada kajian kolum tanah dengan kehadiran tumbuh-tumbuhan. Ksat dan prestasi olahan data dipantau selama sembilan (9) peristiwa air larian ribut sebenar serta penggunaan enam (6) kitaran air larian permukaan sintetik. Analisis media tanah melalui kajian ruang tanah menunjukkan bahawa nilai-nilai Ksat mencapai julat yang disyorkan telah berkurang dari semasa ke semasa yang konsisten dengan kesusasteraan. Selain itu, ia adalah mencukupi untuk merawat bahan-bahan pencemar fizikal, biokimia dan nutrien daripada Kelas IV kepada Kelas II dengan 85% penyingkiran yang berlaku melalui proses pemendapan, penjerapan dan penapisan berdasarkan perbandingan dengan menggunakan ANOVA. Keputusan regresi linear (MLR) analisis menunjukkan prestasi penyingkiran TSS, TP dan beberapa parameter kualiti air boleh menjadi fungsi Ksat relatif (Krel) pada konfigurasi tanah dengan R2 lebih daripada 0.8. Kajian menunjukkan bahan kompos merupakan faktor yang utama yang mempengaruhi nilai Ksat melalui kombinasi parameter kualiti air. Walau bagaimanapun, hubungan antara kedua-dua parameter tersebut adalah berbeza bagi kajian lapangan mengesahkan bahawa faktor-faktor luaran seperti umur dan saiz biopenyimpanan, hujan dan perubahan bermusim telah mempengaruhi keputusan. __________________________________________________________________________________ The conventional method of drainage system was seemed inadequate to cater urban stormwater runoff due to the drastic increment of the urban population. It was limited to the structural approach which related to hydraulic and hydrologic influence. Hence, this approach has been shifted to more holistic approaches by considering the environmental needs. The revised guidelines of Urban Stormwater Management for Malaysia (MSMA) in 2012 was introduced in-line with the current practices to tackle the urban and sub-urban stormwater issues. Bioretention is a favourable practice which mimics natural processes, integrating the sciences and engineering knowledge of hydrology, hydraulics as well as environment into one system. This research aimed to investigate the interaction between soil hydraulic parameter; mainly saturated hydraulic conductivity (Ksat) and water quality treatment performance and to benchmark Ksat based on bioretention performance. The comprehensive data set required for the study was obtained from a series of standard laboratory tests, designated column studies and field investigation. For this purpose, three (3) soil columns were constructed in Physical Laboratory and Modelling, River Engineering and Urban Drainage Research Centre (REDAC), USM. Four (4) soil configurations and one (1) hydrologic parameter were tested for soil column studies: engineered soil mixtures, media depths, compost materials, mulch layers and inflow variation. Both Ksat and pollutant concentration were examined for influent and effluent samples for each soil configuration. Two (2) field bioretention cells were constructed by applying the best treatment condition from soil column studies by the assistance of vegetation. Ksat and treatment performance data were monitored during nine (9) actual storm events as well as the application of six (6) cycles of synthetic stormwater runoff. Analysis of soil media through soil column studies showed that Ksat values achieved the recommended ranges were reduced over the time which is consistent with the literature. Besides, it is sufficient to treat physical, biochemical and nutrient contaminants from Class IV to Class II above 85% of pollutant removal through sedimentation, adsorption and filtration processes based on the comparison using ANOVA. The results of multiple linear regression (MLR) analyses indicate that removal performance of TSS, TP and other water quality parameters is a function of the Ksat relative (Krel) at most soil configurations with R2 obtained more than 0.8. The study showed that compost material is the main factor that influenced the Ksat values through the relationship between the combinations of water quality parameters. However, the relationship between both parameters varies for field studies confirming that external factors such as duration and size of bioretention, rainfall, and seasonal change had influenced the results.
Contributor(s):
Husna Takaijudin - Author
Primary Item Type:
Thesis
Identifiers:
Accession Number : 875008434
Language:
English
Subject Keywords:
Drainage; bioretention; contaminants
First presented to the public:
5/1/2017
Original Publication Date:
12/6/2019
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Civil Engineering
Citation:
Extents:
Number of Pages - 461
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2019-12-06 15:27:06.729
Date Last Updated
2020-11-19 15:38:08.5
Submitter:
Mohamed Yunus Yusof

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Hydraulic conductivity study in engineered soil media for stormwater runoff treatment in bioretention facility / Husna Takaijudin1 2019-12-06 15:27:06.729