Discharge analysis for a system approach to river basin development with Subak irrigation schemes as a culture heritage in Bali

Authors

  • Mawiti Infantri Yekti UNESCO-IHE, Chair Group Land and Water Development, Delft, the Netherlands Udayana University, Department of Civil Engineering, Bali, Indonesia
  • Bart Schultz UNESCO-IHE, Chair Group Land and Water Development, Delft, the Netherlands
  • I Nyoman Norken Udayana University, Department of Civil Engineering, Bali, Indonesia
  • Laszlo Hayde UNESCO-IHE, Chair Group Land and Water Development, Delft, the Netherlands

Keywords:

river basin, Subak irrigation, Subak association, paddy terrace, weir, water distribution unit, continuous flow

Abstract

Paddy terraces in Baliare important cultural landscapes.  Traditionally, the flow within a river basin has been managed using a traditional technology called Subak irrigation.  These schemes are based on the cropping patterns and indigenous water management, which are organized by the respective Subak associations.  Unfortunately, this traditional technology is facing challenges: water shortage and competition with other water users.  In order to sustain agriculture production of Subak irrigation schemes in the Yeh Ho River Basin, the available discharge in Yeh Ho River was analyzed in this study in light of the supply to the Subak irrigation schemes within the river basin.  By using the Weibull formula, the historic supply data of several diversion weirs were analyzed independently.  Based on this analysis it was possible to determine the water balance of the Subak irrigation schemes behind each diversion weir.  Therefore a system approach was developed based on the managed flows within the river basin and the characteristics of the Subak irrigation schemes.  The conclusion is that the discharge in the river will remain the most important factor to sustain the characteristic paddy terraces of these Subak irrigation schemes.

Author Biographies

Mawiti Infantri Yekti, UNESCO-IHE, Chair Group Land and Water Development, Delft, the Netherlands Udayana University, Department of Civil Engineering, Bali, Indonesia

PhD candidate UNESCO-IHE Institute for Water Education, Delft, the Netherlands. Since 1999 as a lecturer with subjects: Fluid Mechanics, Hydraulic, Hydrology in Undergraduate Study and assistant lecturer with subjects : Earth Fill Dam, Advanced Hydrology and Groundwater Movement in Graduate Study of Udayana University, Bali, Indonesia. Since 2004 as hydrology and hydraulic experts and team leader for several projects of water engineering design in Indonesia.

Bart Schultz, UNESCO-IHE, Chair Group Land and Water Development, Delft, the Netherlands

Professor em. at UNESCO-IHE, Institute for Water Education, Delft, the Netherlands and President Hon. of International Commission on Irrigation and Drainage (ICID).

I Nyoman Norken, Udayana University, Department of Civil Engineering, Bali, Indonesia

Professor at Department of Civil Engineering, Udayana University, Bali, Indonesia.

Laszlo Hayde, UNESCO-IHE, Chair Group Land and Water Development, Delft, the Netherlands

Senior Lecturer at UNESCO-IHE, Institute for Water Education, Delft, the Netherlands and Vice Hon. President of International Commission on Irrigation and Drainage (ICID).

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Published

2017-06-12

Issue

Vol. 19 No. 1 (2017): CIGR Journal

Section

I-Land and Water Engineering