The purpose of this study was to assess the impact of irrigatedrnagriculture on household food security in rural areas of Tigray, Ethiopiarnwith special reference to Dibdbo1 irrigation scheme (dam) . The study hasrnthree major objectives. The primary objective was to examine thernirrigation water management practices of the scheme. The secondrnobjective was to assess internal and external problems associated withrnirrigated agriculture and the third objective was to assess the impact ofrnirrigated agriculture on household food security. The "before and afterrnthe project" approach was used for the study by taking 42 households asrna sample.rnResults are based on household survey, key informant discussion, focusrngroup discussion, direct observation and life-history. Data were collectedrnfor the period 1988-1990 E.C (before the project) and 1996-1998 E.Crn(after the project) and analysis was carried out with the help of variousrnmethods and techniques such as Lorenz curve, Gini-coefficient, Povertyrnratio (or Head count), Poverty gap and Squared poverty gap.rnThe result of head count ratio showed that before the projectrnintervention, nearly 83% of the households were identified as poor. Byrncontrast, only about 36% of the households were living below the povertyrnline after project intervention. Moreover, the overall poverty gap was 0.37rnand 0.28, indicating that poor households needed an additional of 37rnpercent and 28 percent of the present income to attain minimum basketrnof basic needs before and after the project.rnThe Gini coefficient derived from the Lorenz Curve is 0.27 and 0.23 forrnhouseholds before and a fter the project res pectively, which implies thatrnthe distribution of income is considered as relatively equal among thernhouseholds before and after the project