| Author | Ahmad, Erfan |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Water Engineering and Management, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | Drip irrigation systems are commonly used for row crops and orchards in water deficit areas but clogging of system is a big problem related to drip irrigation systems. Commonly clogging of emitters is due to low quality of water. Ultimately water distribution uniformity is affected severely, and the system causes under irrigation. The objective of the research was to perform an experiment investigating the efficiency of different modes of chlorination towards unclogging of emitters. Chemical, physical and biological analyses of source water were carried out to check the factors causing clogging. The analysis report showed that emitters were partially clogged due to bacterial colonies that cause sticky layers in the drip lines that ultimately caused clogging. The research methodology includes six levels of chlorination treatment selected after investigating the water analysis and liquid chlorine in the form of sodium hypochlorite (household bleach) was used for this purpose due to its easy handling and cheapness. A liquid solution containing 3 to 15 % chlorine was available in the form of sodium hypochlorite. Sodium hypochlorite containing 15 % chlorine was used in the research. These six levels of chlorine were 0ppm per treatment, 40ppm per treatment, 80ppm per treatment, 120ppm per treatment, 160ppm per treatment and 200ppm per treatment. Each mode has three schedules; S1 five times in one month; S2 three times in one month and S3 two times in one month. The parameters of performance values of drip irrigation system as variation coefficient (Cv), emission uniformity (Eu) and statistical uniformity (Us) of the system were detected under one bar pressure earlier and afterward each treatment and schedule. As the result of the study it was concluded that the emitters were partly clogged and the performance parameters Cv, Us and Eu were changing from 0.244 to 0.239, 75.32% to 80.22% and 60.36% to 71.63% correspondingly. After treatment all performance values of (Cv), (Us) and (Eu) enhanced to 0.0231 to 0.257, 74.31% to 97.68% and 63.06% to 96.15% respectively. The result showed that treatment with 40ppm and 80ppm per treatment were not efficient to achieve the desired standard targets. The treatment T3 (120ppm) showed best and feasible results with schedule S1, treatment T4 (160ppm) per treatment showed best result for schedule S2 and treatment T5 (200ppm) per treatment showed excellent results for schedule S3. For better functioning and long life of system chlorination is mandatory. |
| Year | 2019 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Water Engineering and Management (WM) |
| Chairperson(s) | Babel, Mukand Singh ; |
| Examination Committee(s) | Ekasit Kositsakulchai;Datta, Avishek;Shrestha, Sangam ; |
| Scholarship Donor(s) | World Bank/Punjab Agriculture Department, Pakistan ; |