Abstract:Drip irrigation with Yellow River water has become an important way to solve water shor-tage. However, emitter clogging is a major problem for extending drip irrigation. The scanning electron microscope(SEM)technology and fractal theory were used to analyse the surface topography characteristics of sediment particles in the Yellow River. The results showed that there was a complex biofilm on the surface of sediment particles, which consisted of solid suspended particles, microorganism and extracellular polymers(EPS). The surface topography of sediment particles expressed the fractal and multifractal characteristics, while the multifractal singularity spectrum was more suitable to characterize the complex surface topography of sediment particles.With its huge surface area, a large amount of microorganism could be adsorbed on the sediment surface in the Yellow River, and the extracellular polymers secreted by microorganism was up to 276.08-360.68 mg/L. Innovative or novel control strategies need to be established for emitter clogging of drip irrigation with Yellow River water. The sediment particles and the interaction between sediment particles and microorganism should both be considered to seek more effective methods to control emitter clogging.
王伟楠, 徐飞鹏, 周博, 冯吉, 李云开. 引黄滴灌水源中泥沙表面附生生物膜的分形特征[J]. 排灌机械工程学报, 2014, 32(10): 914-920.
Wang Weinan, Xu Feipeng, Zhou Bo, Feng Ji, Li Yunkai. Structural and fractal characteristics of biofilm attached on surfaces of sediments in Yellow River for drip irrigation. Journal of Drainage and Irrigation Machinery Engin, 2014, 32(10): 914-920.
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