PALAR BASIN/RIVER Record 1 of 4 - TROPAG & RURAL 1975-2001/12 TI: Maintenance of irrigation networks under major tanks in Tamil Nadu AU: Sivasubramaniyan,-K. AD: Madras Inst. of Development Studies, Chennai 600020, Tamil Nadu, India SO: Review-of-Development-and-Change (India). 1998, v. 3(2) p. 264-296; Jul, figs, tables, 16 ref.; summary (En) AB: The maintenance of irrigation networks such as inlets, main and branch canals, and field channels in 2 major tank irrigation schemes in the Palar basin of Tamil Nadu, India, was examined. The involvement of the Public Works Department and the ayacutdars (farmers owning land in the scheme) in maintenance activities, in particular cleaning of the canals and channels, was assessed. Important issues involved in the maintenance of tank irrigation networks and factors determining the extent of users' participation in the maintenance of irrigation infrastructure are discussed. From author's summary. PY: 1998 Record 2 of 4 - TROPAG & RURAL 1975-2001/12 TI: Cooperating for survival: tannery pollution and joint action in the Palar Valley (India) AU: Kennedy,-L. AD: Centre National de la Recherche Scientifique (CNRS), Talence, France SO: World-Development (UK). 1999, v. 27(9) p. 1673-1691; Sep, figs, tables, 33 ref.; summary (En) AB: In 1995, the Supreme Court of India ordered the closure of hundreds of tanneries in Tamil Nadu for failing to treat their effluents. With their survival at stake, leather producers in the middle Palar Valley (Vellore District) opted overwhelmingly for a collective solution, and took immediate steps to form central treatment plants. Co-operation, facilitated by community ties and shared local identities, enabled the clusters to meet the "pollution crisis". Difficulties that arise from collective action, notably monitoring and compliance, and public-private interaction in the pursuit of environmental goals are examined. Sustaining co-operation and future prospects of joint action are also discussed. From abstract Elsevier Science Journal. PY: 1999 Record 3 of 4 - TROPAG & RURAL 1975-2001/12 TI: Irrigation planning of Kaveripakkam tank through simulation AU: Venugopal,-K.; Gopalakrishnan,-T.V.; Venkataraman,-M. AD: Anna Univ., Centre for Water Resources and Ocean Management, Guindy, Madras 600025, Tamil Nadu, India SO: Water-Resources-Journal (ESCAP). 1998, no. 196, p. 75-80; Mar, figs, tables, 8 ref.; summary (En) AB: The contribution of tank irrigation in Tamil Nadu, India, has declined from 33 to 20% in the last 3 decades; canal irrigation and well irrigation contribute each 40%. The performance of a major water reservoir, Kaveripakkam tank, to meet the irrigation demands was assessed, using historical data for the period 1976-1991. The tank with a capacity of 32.9 million m3 has a free catchment of 31 km2 and a combined catchment of 127 km2. Kaveripakkam tank also receives water from the Palar River. The tank has a registered ayacut (command area) of 2436 ha with rice as the principal crop. The average annual rainfall in the area is 925 mm. Generally, 2 crops are grown; the first cropping season starts in August and the second crop season starts in Jan. The runoff into the tank was computed using the Soil Conservation Service (SCS) method. The crop water requirements were computed by the modified Penman method using CROPWAT software. The water requirement was computed taking into consideration the effective rainfall and conveyance efficiency. A simulation model was developed with monthly time-step for assessing the performance to meet the irrigation demands for the first crop and to arrive at the policy to be adopted for deciding the second crop area. From authors' summary. PY: 1998 Record 4 of 4 - TROPAG & RURAL 1975-2001/12 TI: Irrigation institutions under two major system tanks in Tamil Nadu AU: Sivasubramaniyan,-K. AD: Madras Inst. of Development Studies, Chennai 600020, Tamil Nadu, India SO: Review-of-Development-and-Change (India). 1997, v. 2(2) p. 355-374; Jul, fig, tables, 15 ref.; summary (En) AB: An investigation was carried out in Tamil Nadu, India, to better understand the interrelations between physical, socio-economic, technological and institutional factors and their impact on irrigated land from a historical perspective in the context of 2 small-scale, village tank (small water reservoir and canal) irrigation systems, located in the larger Palar Anicut System. Successful irrigation management, a precondition for "efficient" functioning of irrigation institutions, is contingent on several factors. These include the physical design of the irrigation system, cropping pattern, technology used for crop production, land tenure system, landholding pattern, yield variations due to differential sources of irrigation (surface and subsurface), and adequacy/assurance of water supply across reaches and throughout the season. From author's summary. PY: 1997