Report No: R-39.4 PILOT PROJECT FOR FARMER-MANAGED IRRIGATED AGRICULTURE UNDER THE LEFT BANK OUTFALL DRAIN, STAGE-I PROJECT MONITORING AND EVALUATION OF IRRIGATION AND DRAINAGE FACILITIES FOR PILOT DISTRIBUTARIES IN SINDH PROVINCE, PAKISTAN Voluinc Four IIeran Distributary, Sangliar District Interim Report 1) y Ui I<. 1,ashari M. Navccd Kliayal Niaz Hussain Sial Abdul Majeed Ansari Abdul Jalil Ursaiii Gliulam Shabir Soomro M. Ghous Lagliari M. Akhtar Bliatti M. S. Shafique Caylord V. Skogerboe December 1997 IIY DICKABAD OFFICE PAKISTAN NATIONAL PROGRAM INTERNATIONAI, IRRIGATION MANAGEMENT INSTITUTE TABLES 01' CONTENTS TABLE OF CON'I'ENI'S ............................................................................................................................................. i LIST OF TABLES AND FICtJRES ....................... .....:............................................................................................ ii ... ACKNOWLEDGMENTS.......................................................................................................................................... 111 ... 1 . IN'rHODUC 1 ION .............................................................................................................................................1 1.1 BACKWOUND ............................................................................................................................................ I 1.2 PURPOSE ...................................................... ........................................................................................... 1 1.3 ACCOMI'LISIIMIIN'I' IN I IIRAN UIS'fRI 'AKY COMMAND AREA ................................................ I I .4 MONITORING AND LiVAl-lJATION 01: IIERAN DISTRIDUTARY ........................................................ 2 2. DESCRlP'I'ION OF HEKAN ~~~t'~WW~'A~Y............................................................................................ 3 2.1 LOCATION ............................................................................................................................. 2.2 SAI~llNrI'IIYSICAl, F1~AT~JK13....................................................................................... 2.3 CLIMA'J'E....................................................................................................................................................... 3 2.4 IRRIGA'I'ION SYSTEM .......................................... ............................................................................... 3 2.5 DRAINAGE SYSTEM .................................................................................................................................. 7 2.6 LAND USIi ......... .................................................................................. 2.7 CXOI'S ................ ................ ................................................................................................... 8 2.8 GROUNDWATER ................................................................................... ............................................ x 2.0 I1UW.iA'l'lON PRA\C"I'IC'ES..................................................................... ............................................. 0 3. KESUL'I'S AND DISCtJSSION...................................................................................................................... 10 3.1 IRKIGA'fION DELIVL:.RY SYSmvl .......................................................................................................... 10 3. I.I O~icrvi~ionsoflt.rig(iiiorr Dcliwty Sjwcrrt................... ............................................................. 10 3. I. I. I IrrigJtion Supplics at Ilcud Rcgulator of thc llcran Distributary ........................................... 3.1. I .2 Irrigation Supplics at Watcrcoursc Outlcts .................. .................................................... 13 3. I. I .3 1:luctuations in Watcrcoursc Supplics 3.1.2 tWiirrtcwrrrcc of Ii.r.igr 3. 1.2.I Gcwc*rtrlMtririicwrr~cv ,. , . , ,_., , .......................................... 3.1.2.2 Physical Cotitlilions. .......................................................... 3.2 DKAINflGI~ DISPOSAL SYs-niM (DW.................................................................................................. 3x 3.2.I ~~/Jl'l'flfff~~l.SO~/~lYl~lltl~f~ ~~l~.~/t'lll ..................................... ..................... .j 9 3.2.1.1 l)raiwc EnlusnI ................................................................ 3.2.1.2 WIICI *r;lblr iwi1............................................. ............................................. 3.2.I .3 (itwmiwaw Vualits. ............................................... ...................................... 3.2.2 Altriritcwtrrtcv 01 /hiituig(>.Syst~w~ ........................................ ........................ 4 CON c 1- I<) NS .............................................................................................................................................. 4 5 1. .- Kit: LHEN C ............................................................................................... .~........................................................ .4S ANNEXES A"lX A DlSCll ARGI: Ml%SUREM1iNTS .......................................................................................................... 46 A"I:.X 13 PII'.mMITER 1)A'I-A ............................................................................................................................. 00 I LIST OF 'TABLES AND FIGURES .. I able 2.1 . Saliellt features oftllc 1 leran Distributary; Sanghar..................................................................................... 6 Tahlc 2.2. Salicnt fcatures of thc Kliadwari Minor (Hcran Distributary). Sanghar....................................................... 6 Table 2.3. Salient features of surfacc drains in thc Ilcran Distributary command am, Sanglinr .................................. 7 Tablc 2.4. Salient fcatures of tubewells in thc Hcran Distributary command area ...................................................... 8 'rablc 3.I Types of outlets and their operating condition (Iicran Distributary)......................................................... 13 'rablc 3.2 Typcs of outlets and their operating condition (Khadwari Minor) ........................ ..................................... 14 Table 3.3. Coefficient of temporal variation for day and night dischargc mcasurenicnts of I lcriii Distributary. Sanghar ................................................................................................................................. 21 Table 3.4. Coefficicnt of temporal variation on an hourly basis for dischargc nicasiircnicnts of I lcraii Distributary, Sangliar ................................................................................................................................. 36 Table 3.5. Performance sununary of Irrigation Delivery System of the Heran Distributary, Sanghar........................ 36 Tablc 3.6 Vegetative growth and weak-portion survey of the Heran Distributary and Khadwnri Minor, Sangliar ...................................................................................................................................................... 38 Table 3.7. Contribution of the surface drains in 1 lcran Distributary Command Area, Sanghar............................. 39 Table 3.8. Water quality in the llcran Distributary Comniand Arca. Sanghar............................................................ 43 Tahle 3.9. Vegctative growth and weak-portion siirvcy of surfacc drains in the Heran Distributary ConinmJ ha.Sawllar ........................................................................................................................... 44 FIGURES Figure 2.1. Location map of thc llircc pilot distributarics in Sindh Province ..............................................................4 Figiirc 2.2. Layolit plan of tlic 1 lcrali Distributary command area .............................................................................. 5 Figure 3.1. Monthly avcragc discliargc entering Heran Distributary for Kliarif 1997 ..............................................11 Figwe 3.2. Tcmporal Coefficicnt of Variability at head regulator of thc Ileran Distriburtary for Kharif 1997 ....... 12 Figure 3.3. Normalizctl watcr tliscliargc of outlcts from I leran Distributary for April 1997 .................................... 15 Figure 3.4. Normalized water discharge of outlets froni Heran Distributary for May 1997 ..................................... 16 Figurc 3.5. Nornializcd water discharge of outlcts from-heran Distributary for June I997 ...................................... 17 Figure 3.6. Normalized water discharge of outlets froni Heran Distributary for July 1997 ...................................... 18 Figure 3.7. Nornialized water discharge of outlets from Heran Distributary for Aug 1997 ..................................... 19 . Figure 3.8. Nornialized water discharge of outlets from Heran Distributary for Sept 1997 ..................................... 20 Figure 3.9. Spatial Coefficient of Variability aniong the outlets from Heran Distributary Kharif 1997 ...................22 Figurc 3.10. Temporal Coefficient of Variability at outlets from the IIeran Distributary for Kharif 1997 ................23 Figure 3.11. Discharge of Heran Distributary and some sample outlets (Aug 18/19.1997) ...................................... 24 Figure 3.12. Discharge of Heran Distributary and its sample outlets (August 19/20. 1997)