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Framework of the study. Problem definition Objectives of the study Background of studied area Methodology Results and discussion Conclusions and recommendations. Problem Definition. The agricultural sector employs more than 55% of labors force .
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Framework of the study • Problem definition • Objectives of the study • Background of studied area • Methodology • Results and discussion • Conclusions and recommendations
Problem Definition • The agricultural sector employs more than 55% of labors force . • Rain, spate and spring irrigation were predominant in the past in Sana’a Basin. • Since thirty years ago tub-wells became the main source for water irrigation. • Agriculture consumed approximately 90 % of groundwater for irrigation by using traditional irrigation methods
Groundwater depletion is About 5-7m per year • Estimated Withdrawal is ≈ 260Mm3 • Recharge of groundwater is about 46Mm3 • Quality of water degradation • So agriculture activities will face a big problem in the near future
Study Objectives • To discernment irrigation water management on-field level. • To evaluate the role of economic incentives in groundwater depletion. • To assess farmers awareness, policy and the application of legislation to improve irrigating water uses efficiency.
Area 3250 Km2 325000 ha Background of Studied Area <2000m N 1666100, 1750000 >3600m E 390000, 452150
Districts of Sana’a Basin 43.2% 38,891 24.2% 10,046 100% 100% 1,747,834 100% 73,957 32.5% 11,779 74.9% 63,612 80.6% 64,832 28.6% 28,605 5.9% 3,009
<100mm Rainfall The average of rainfall is 200-250mm/y. >315mm
Geology 1- Quaternary alluvium 2- Quaternary volcanic3- Tertiary volcanic4- Cretaceous sandstone 5- Jurassic limestone
Previous Studies Sana'a basin submitted to many studies but the important of them is: • Italconsult between 1970-1973 • Howard hammvi, 1980-1983 • Russian study by Mosgiprovodkhoz, 1986 • TNO, 1987-1996 • WEC studies in 2001. • Hydrosult, SBWMP, 2003 ( continues) • GAF, 2005 • JICA studies in 2007
Distribution of Irrigated agriculture Bani-Al-Harith Bani-hashish Hamdan
Abstraction and Irrigated Area *hectare ×1000 **MCM
Library activity • Responsible Interview • Data collection • Questionnaire Design • Sampling Plan • Farmers Interviews • Data analysis Methodology
Questionnaire design • Number of questions (87) are included in the following factors: • General questions • Crop pattern and water management • Economic incentives • Social awareness • Institutional effort • Laws, legislations and water conflicts issues
Estimated distance between the farm and source of irrigation water
Problems accompanying using modern irrigation methods • Blockage • Design difficulties • Unsuitable for big tree • Expensive • Bad quality • Lack of instructions • Tilling • Scattering of frame parts • Low yield • Change crops • Long distance between farm and well
Rationing water used by using modern irrigation Methods • Guidance farmers to use modern irrigation Methods, non expended in area of cultivation and no flooding • Water saving • Awareness and advice • Subsidies and entering modern irrigation Methods Goals of WUA