The main objective of this study is to assess the management and expansion of small holder pump irrigation along the course of lower Gumara River. To achieve the specified objectives, both primary and secondary data sources were used. The primary data were collected from field investigations and observations, sampling of 98 randomly selected respondents through semi-structured questionnaire. Secondary data were also gathered from different sources like office of Agriculture, Development Agents, Reports, published and unpublished sources. Land use/cover change analysis like ArcGIS and ERDAS were used to understand the expansion of small holder irrigation along the River course. CROPWAT model has been also employed to estimate the irrigation requirements of the crops commonly cultivated by the irrigators. The results of the study show that from 2001 to 2017, irrigated agricultural land increased by 65.25% (from 322.82ha in 2001 to 2307.71ha in 2017), non- irrigated agricultural land decreased by 53.48%, forest/shrubs decreased by 3.12% and flooded agricultural land decreased by 8.65 %. Generally, there was high expansion of irrigation along the lower course of Gumara River. The irrigation requirements (in mm) for Onion, Tomato, Potato and Maize are 338.1, 322.1, 331.3, 249.5 respectively. The annual irrigation water consumption from the river increased from 1733624 m3 in year 2001 to 12392980 m3 in year 2017 for irrigation, whereas the average annual supply of water for the irrigation period (Nov-June) from the River is 51289236 m3 (nearly constant supply). However, supply was short of demand in April and this resulted in competition for water in recent times. Small holder motor pumps were found to be the main technologies to draw water to the fields from the River. Based on this study, insufficient water source, lack of awareness, cost of water lifting technologies, materials and services, markets and finance are the major factors influencing the adoption of the motorized water pump in this area. As the expansion of irrigation continues, it is recommended to work on improving the efficiency of water utilization, to look for alternative water sources (groundwater, water harvesting) and to raise the awareness of the irrigators on the value of water among others. Keywords