International Journal of Academic Multidisciplinary Research (IJAMR)   Year: 2020 | Volume: 4 | Issue: 9 | Page No.: 9-17 Distribution and Mapping of Aquatic Weeds in some Minor Canals, Gezira Scheme, Sudan (2018) Samah O. A. Alhadari , Awadallah B. Dafaallah and Mohamed S. Zaroug Abstract: Aquatic weeds have various problems in water bodies, irrigation and drainage systems around the world. Sudan have been greatly affected by aquatic weeds in many irrigated schemes such as Gezira scheme. The objective of this study was to evaluate the distribution and mapping of aquatic weeds in some minor canals in the Gezira Scheme in 2018. The study area covered six minor canals at Centre Group at Gezira Scheme; namely: Barakat I, Barakat II, Barakat III, El sonni, El ibrahim and Haj elnour which were divided into 18 sampling sites (3 sections for every canal). The distribution (percentage of frequency) of aquatic weeds of each site was determined. Geographical distribution of aquatic species was determined using the geographical positioning system (GPS). Data were subjected to descriptive analysis and to analysis of variance (ANOVA). The results showed that considerable differences in distribution of aquatic weeds throughout the year with different frequency as follows; floating weeds (50% - 61%), emergent weeds (18% - 24%), submergent weeds (0% - 13%) and bank aquatic weeds (61% - 67%).The most dominant species were Vossia cuspidata and Cynodon dactylon (100%) in both summer and winter seasons. Also, the results showed that the percentages of frequency of most aquatic weed species in the six minor canals were higher in the winter season than summer season, in addition to differences in the geographical distribution of aquatic species throughout the year. All these findings give many insights about the problems of aquatic weeds in minor canals and would be useful in the management of aquatic weed species.