ACIAR - Southern Lao Project                          Water ComponentParticipants include: Phil Eberbach, Thavone Inthavon...
SLP Water component                      Rainfed – rice                           Farm or community                       ...
4.1 Water Balance of the Champasak ProvinceIrrigation = Evapotranspiration – rainfall – residual carryover soil water - dr...
4.1 Assessment of water availability and deficitirrigation for non-rice crops in rainfed region of               Southern ...
Soil dataClay      Downward (D)            Sat, FC, %                                WP, Air                              ...
Deficit irrigation recommendation
Assessment of water availability and deficitirrigation for non-rice crops in rainfed region of               Southern Lao ...
• Minor amount of groundwater data is available for Savannakhet but thereis a paucity in knowledge of the groundwater asso...
Boreholes which can be used for groundwater and salinity monitoring for detailedgroundwater study in the Soukhouma and Cha...
Days after 1 October 2011        0         20           40           60             80            100     120         140 ...
4.1 Surface water availability and use from        farm ponds in southern Laos Describes the existing uses and management...
Ponding depth (cm)   300.0                     Pond No. 1 (Khok Nounbua, Sokhuma)                                         ...
Village        Have pondChampasak        (% of HH Pond has water                      Use for                surveyed)    ...
4.2 On farm trials of integrated water saving and waterproductivity to secure WS rice and secure DScrop/fodder option Alt...
4.3 Agronomic evaluations and dissemination of newdrought rice varieties Early wet season droughts commonly affect WS  ri...
4.4 Strengthen community water management schemesand adoption of water-saving technologies at the systemor community level...
ACIAR - Southern Lao Project Water Component
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ACIAR - Southern Lao Project Water Component

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ACIAR - Southern Lao Project
Water Component

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ACIAR - Southern Lao Project Water Component

  1. 1. ACIAR - Southern Lao Project Water ComponentParticipants include: Phil Eberbach, Thavone Inthavong, Ketema Zeleke;Somsamay Vongthilath, Ruben Lampayan, Ben Samson, Stefan HaefelePany Vanmanivong Keo Souvanh, Phouvieng Songseum,Khamma Keovised, Jono Newby
  2. 2. SLP Water component Rainfed – rice Farm or community ponds 4.1 - 4.2 Groundwater – 4.1 Rice breeding for flood and drought tolerance Supplemental – 4.3 irrigated water Rice Carryover of Wet residual water 4.1 season Water saving strategies – 4.2 Dry season Rice Alternate crops or forages Social and economic impact of improve access to water -4.4
  3. 3. 4.1 Water Balance of the Champasak ProvinceIrrigation = Evapotranspiration – rainfall – residual carryover soil water - drainage
  4. 4. 4.1 Assessment of water availability and deficitirrigation for non-rice crops in rainfed region of Southern Lao PDR •Modelling approach to estimate the probable amount of residual water remaining at the end of the wet season. •Simplified modelling approach NAFRI/UQ (SWBM) adopted •Apply the output spatially
  5. 5. Soil dataClay Downward (D) Sat, FC, % WP, Air (Saxton & Rawls) Start of Climate data growing season Rainfall ETc •Point based (daily) End of •Gridded surface growing (weekly) season
  6. 6. Deficit irrigation recommendation
  7. 7. Assessment of water availability and deficitirrigation for non-rice crops in rainfed region of Southern Lao PDR •Need to apply the model spatially in Champasak province •Challenged by a lack of spatial rainfall data • Output of a probabilistic spatial carryover soil-water map to advise on irrigation requirements Photo: T Inthavong
  8. 8. • Minor amount of groundwater data is available for Savannakhet but thereis a paucity in knowledge of the groundwater associated with the Mekongalluvium in Champasak province•Currently rates of development in Champasak necessitate anunderstanding of the resilience of the system for sustainable management•Current estimates of recharge indicate about 69 – 76 mm of rainfall(about 2-5%) in Savannakhet enters groundwater while in Champasak initialestimates indicate up to 15% of rainfall may recharge groundwater Photo: K Zeleke
  9. 9. Boreholes which can be used for groundwater and salinity monitoring for detailedgroundwater study in the Soukhouma and Champasak provinces.
  10. 10. Days after 1 October 2011 0 20 40 60 80 100 120 140 160 0 1 2 3 4 5 BoungkeoWmGhpdevt)(l Hieng 6 Nongnang Pakor 7 Samkha Thadan 8 Tupchane 9 As bores are used conjunctively to support households it is difficult to separate domestic pumping from behaviour of the local groundwater system
  11. 11. 4.1 Surface water availability and use from farm ponds in southern Laos Describes the existing uses and management of farm ponds and factors affecting availability Optimal farm design to utilizing farm dams, and management to optimize water use Seven dams monitored in Savannakhet and Champasak province Photo: R Lampayan
  12. 12. Ponding depth (cm) 300.0 Pond No. 1 (Khok Nounbua, Sokhuma) Maximum and current pond water depths for 7 ponds 250.0 200.0 150.0 100.0 50.0 0.0 Location Water depth (cm) Current % Max depth* remainingPonding depth (cm) Pond No. 2 (Bak Village, Sokhuma) 250 200 1. Khok Nounbua, 150 100 Sokhuma 283.8 140.6 49.5 50 0 2. Bak, Sokhuma 191.4 74.8 39.1Ponding depth (cm) 180 Pond No 3 (Oparath Village, Phontone) 3. Oparath, Phontone 170.7 84.2 49.3 160 140 120 100 80 60 4. Nasomvang, Phontone 243.2 100.7 41.4 40 20 0 5. Na Chanoa, Outhompone 226.8 140.8 62.1Ponding depth (cm) Pond No 4 (Nasomvang Village, Phontone) 6. Phin Nuang, 300 250 Othompone 192.0 95.4 49.7 200 150 100 50 7. Champone 189.2 73.9 39.1 0 *Current water depth as of Jan 30, 2012
  13. 13. Village Have pondChampasak (% of HH Pond has water Use for surveyed) all year Use for Nursery Crop/VegPhaling 10% 67% 33% 0%Oupalath 43% 69% 23% 62%NonePhajao 17% 20% 0% 0%Boungkeo 27% 100% 25% 25%KhokeNongbua 13% 100% 0% 25%Hieng 3% 0% 0% 0%Total 19% 71% 18% 32%
  14. 14. 4.2 On farm trials of integrated water saving and waterproductivity to secure WS rice and secure DScrop/fodder option Alternate Wetting and Drying Dry season rice production -Evidence suggests Field water depth (cm) substantial water savings are possibly Soukuma, 2011 DS FP 15 10 AWD 5 0 -5 - Yield appears -10 largely unaffected -15 -20 Photo: R Lampayan
  15. 15. 4.3 Agronomic evaluations and dissemination of newdrought rice varieties Early wet season droughts commonly affect WS rice crops in Lao Drought tolerant lines developed by IRRI have been tested in Lao and shown enhance rice survival during early rainless periods Photo: S Haefele
  16. 16. 4.4 Strengthen community water management schemesand adoption of water-saving technologies at the systemor community level Improve the understanding the nature of water sources in Lao and of the relationship between Lao people and these sources of water Photos: Jono Newby
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