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Farmers in Pakistan either rely only on groundwater or manage conjunctive use of surface and groundwater for irrigating
crops due to shortage of canal water. Present study was undertaken to find variations in conjunctive water management
practices, groundwater productivity and crop profitability in Chuharkana irrigation sub-division in Punjab. Physical and
questionnaire based data were collected from 120 farmers using stratified random sampling technique from vicinity of four
watercourses of Lagar distributary. Trajectory method was employed to measure tubewells’ discharge for evaluating
groundwater productivity across watercourse reaches. EC, SAR and RSC were measured to evaluate groundwater quality.
Results show prevalence of surface and groundwater use for irrigation. Area under conjunctive use decreased from 76.6% at
head to 46% at tail due to decreased canal water supply towards tail while area irrigated by groundwater-only increased from
20% to 54% across head to tail. Analysis of groundwater samples showed lower quality levels. EC, SAR and RSC ranged
between 1.27-1.55 dS m-1
, 6.39-9.54 (mmol L-1
)
½ and 3.75-4.18 meL-1
respectively, with higher values towards tail.
Groundwater productivity for wheat was relatively higher at the head, while that of rice did not vary much across
watercourse reaches. Conducive soil conditions and more reliance on groundwater for timely irrigation resulted gross
margins at the tail.
Muhammad Usman, Azhar Abbas, Zulfiqar Ahmad Saqib. (2016) Conjunctive Use Of Water And Its Management For Enhanced Productivity Of Major Crops Across Tertiary Canal Irrigation System Of Indus Basin In Pakistan, , Volume-53, Issue-1.
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