Extrapolation domains and land use
plans for the coastal zone of
Bangladesh
Andy Nelson and Parvesh Chandna on behalf
of G...
Partners and acknowledgements
IRRI International Rice Research Institute
IWM Institute of Water Modelling
LGED Local Gover...
OUTCOMES

Change in Knowledge,
Attitude and/or Skills

PROJECT OUTPUTS

Change in Practice /
Behaviour

IMPACT

Local GO, ...
Best bet options in coastal Bangladesh
Target area for extrapolation domains
Outputs
Coastal polders cover 1m ha
Target area for extrapolation domains
Outputs
Target area for extrapolation domains
Outputs

Low saline - Polder 43/2f
Up to two crops per year

High saline - Polder 3
...
Best bet options in coastal Bangladesh
Suitable areas for innovative cropping systems?
Spatial analysis of suitability fac...
G1 Outputs
Land use maps
“What is there now?”
Cropping system extrapolation domains
“What works where? Now and in the futu...
1 million ha of extrapolation domains

?

?

?
?

?

?
?
?

?

?
?
? ?
From the 2008 Agriculture census
1.45m farm holding...
Four current cropping systems
Aman - Rabi
Traditional Aman rice and Rabi non-winter crop
T. Aus - Aman
Transplanted HYV Au...
Target area for extrapolation domains
Opportunity for rice Aug-Nov and shrimp Feb-Jun
Current practice – shrimp farming in...
Seven innovative cropping systems
Low saline zone
Aus HYV - Aman HYV
T.Aus HYV - Aman HYV - Rabi
T.Aus HYV - Aman HYV - Bo...
Extrapolation domains …
Characterise the cropping systems
1 Expert assessment of the requirements for
each cropping system.
2 Identification and c...
We start with a narrative…
Aman - Rabi
Traditional Aman rice is transplanted in Aug and
harvested in Dec/Jan. Aman rice is...
Some are quite complex…
T.Aus HYV - Aman HYV - Boro HYV
A short duration Aus HYV is seeded in early April, transplanted in...
Irrigation 1 Fresh (< 4dS/m) ground water availability
with GW 2 Ground water pumping depth
3 Latest month when river wate...
Requirement for aquaculture
Extensive Gher based year round brackish water aquaculture
Description

Shrimp PL is stocked
i...
Water requirements for Aman - Boro
Aman - Boro

Water quality and availability in dry season

Difference
Internal
Aman - B...
Groundwater

Fresh
groundwater
(< 4dS/m)

Tubewell?

Yes

Surface water

Tubewell
depth
(m)

Month when
river water
(< 3 d...
Groundwater

Fresh
groundwater
(< 4dS/m)

Tubewell?

Yes

Surface water

Tubewell
depth
(m)

Month when
river water
(< 3 d...
Example: Input datasets
Min temp – 8th-14th Feb

Flood inundation depth

Soil salinity

Soil texture

Water salinity

Soil...
Example: Input datasets
Through our partners we have obtained the 2011 population and 2008
agricultural census’ at village...
Post larvae shrimp stocking…
1-7 days - Feb

22-28 days - Feb

8-15days - Feb

16-21days - Feb

1-7 days - March
Draft maps – not for distribution

Ex Domains: Shrimp – Aman system
Draft maps – not for distribution

Traditional aquaculture system
Draft maps – not for distribution

Ex. Domains: T. Aus – Aman system
Draft maps – not for distribution

What is needed for higher accuracy

Shrimp

Aman Rice
WebGIS and access to data …
Improve access to / use of information
Bangladesh is a “data rich environment”, with many
institutes, measuring, monitorin...
WebGIS to share data and models

Source: esri.com

The best way to get value from data is to give it away
Source: G1 most ...
WebGIS to share data and models
Data authors/owners publish data on a GIS Server.
Via the WebGIS, the data are accessible ...
WebGIS on the “cloud”
We use ESRI ArcGIS Server on an Amazon
Elastic Compute Cloud (EC2) instance
Always on, always access...
Demo system – under construction
Demo system – under construction
Demo system – under construction
Demo system – under construction
Demo system – under construction
Demo system – under construction
Demo system – under construction
What is new/exciting?

1. First cropping system maps of the coastal zone
2. Highly detailed: spatial, temporal and themati...
Where next in 2014?
1. Completion of data sets and extrapolation domains

2. Assessment of extrapolation domain maps via f...
Thank you
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G1 extrapolation domains and land use plans for the coastal zone of bangladesh

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by: Andy Nelson and Parvesh Chandna
Presented at the GBDC Reflection Workshop, November 2013

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G1 extrapolation domains and land use plans for the coastal zone of bangladesh

  1. 1. Extrapolation domains and land use plans for the coastal zone of Bangladesh Andy Nelson and Parvesh Chandna on behalf of G1 partners 12 Nov 2013
  2. 2. Partners and acknowledgements IRRI International Rice Research Institute IWM Institute of Water Modelling LGED Local Government Engineering Department SRDI Soil Resources Development Institute BWDB Bangladesh Water Development Board
  3. 3. OUTCOMES Change in Knowledge, Attitude and/or Skills PROJECT OUTPUTS Change in Practice / Behaviour IMPACT Local GO, extension agents and scientists responsible for agricultural technical innovations, national policy makers Extrapolation domains for each technology Learn about new technologies and where its chances of adoption is greatest. Use of domain maps as a decision support tool to more effectively scale up the adoption of new technologies. Current and future land use plans in coastal zone Understand the implications of different land use plans under different future scenarios. Use the maps as decision support tools when planning future interventions. WebGIS to share and disseminate G1 Learn about advantages of open access and mutual More straightforward and streamlined data Increased chances of developing a national open (spatial) data policy Increased chances of appropriate technology adoption and likelihood of adoption of sustainable land and water use policies.
  4. 4. Best bet options in coastal Bangladesh Target area for extrapolation domains Outputs
  5. 5. Coastal polders cover 1m ha Target area for extrapolation domains Outputs
  6. 6. Target area for extrapolation domains Outputs Low saline - Polder 43/2f Up to two crops per year High saline - Polder 3 Rice/shrimp & Aquaculture Moderately saline - Polder 30 – Usually one crop per year
  7. 7. Best bet options in coastal Bangladesh Suitable areas for innovative cropping systems? Spatial analysis of suitability factors/constraints How will this change in future? Impact of future scenarios on factors/constraints How can we inform stakeholders about the opportunities? Improved dissemination/sharing of information
  8. 8. G1 Outputs Land use maps “What is there now?” Cropping system extrapolation domains “What works where? Now and in the future” Southwest Coastal Region Information System “Open access spatial data - webGIS”
  9. 9. 1 million ha of extrapolation domains ? ? ? ? ? ? ? ? ? ? ? ? ? From the 2008 Agriculture census 1.45m farm holdings, 10% of national total ? 7.3 million people and 2m labourers 700,000 ha, average holding < 0.5ha Irrigated area is 25%, national average is 68% HYV rice area 24%, national average is 56% ? ?
  10. 10. Four current cropping systems Aman - Rabi Traditional Aman rice and Rabi non-winter crop T. Aus - Aman Transplanted HYV Aus rice and traditional Aman rice Shrimp Brackish water shrimp Year round aquaculture Extensive gher based year round brackish water poly culture
  11. 11. Target area for extrapolation domains Opportunity for rice Aug-Nov and shrimp Feb-Jun Current practice – shrimp farming in Feb-Jun Daily water salinity Lower threshold limit of salinity - Shrimp Water salinity (ppt) Upper threshold limit of salinity - Rice Shrimp Rice Date Opportunities for intensification (Polder 3)
  12. 12. Seven innovative cropping systems Low saline zone Aus HYV - Aman HYV T.Aus HYV - Aman HYV - Rabi T.Aus HYV - Aman HYV - Boro HYV Moderate saline zone Aman HYV - Boro HYV Aman HYV - Rabi High saline zone Shrimp+fish - HYV Aman+fish Improved year round aquaculture Polder 43/2F Polder 43/2F Polder 43/2F Polder 30 & 43/2F Polder 30 Polder 3 Polder 3
  13. 13. Extrapolation domains …
  14. 14. Characterise the cropping systems 1 Expert assessment of the requirements for each cropping system. 2 Identification and collection of data that either measure or act as proxies for those requirement. 3 Suitability scores based on location specific characteristics relative to the cropping system requirements. 4 Suitability maps for each cropping system. 5 Review and revise maps with focus groups.
  15. 15. We start with a narrative… Aman - Rabi Traditional Aman rice is transplanted in Aug and harvested in Dec/Jan. Aman rice is almost entirely rainfed and uses local varieties that can withstand flood depth to 0.8 m. The Rabi crop (e.g. sesame, mungbean) is seeded in Feb-Mar and harvested in May-Jun. The Rabi crop uses residual soil moisture with supplemental irrigation when ground water or (stored) canal water is available. Rainfall at the end of the rabi season can negatively affect the crop, thus good surface drainage is important.
  16. 16. Some are quite complex… T.Aus HYV - Aman HYV - Boro HYV A short duration Aus HYV is seeded in early April, transplanted in late April and harvested by end of July. The Aus crop uses seedbeds and land preparation and is irrigated when river water is fresh, with groundwater (GW) or from canal water. In this case, capacity of gravity irrigation is considered. Short duration, non photoperiod sensitive Aman HYV is transplanted by first week of August and harvested by the end of November. The Aman rice crop is completely rainfed. Its performance depends greatly on maximum inundation depth/land topography. When inundation depth > 0.4 m, drainage capacity must be considered. This, in turn depends on the difference between land elevation and the water levels at low tides and distance from canals/rivers. Boro HYV is transplanted before mid December and harvested by mid April. The Boro rice crop is irrigated with GW or river water (when fresh) or with water stored in canal networks. When river water is fresh, the ability to irrigate by gravity is considered. Storage capacity is considered when stored water is used. Distance from water source is considered in both cases. …a lot of data needed
  17. 17. Irrigation 1 Fresh (< 4dS/m) ground water availability with GW 2 Ground water pumping depth 3 Latest month when river water <3 dS/m 4 Maximum river water salinity in April/May 5 Maximum river water salinity in August Irrigation 6 Difference in high water level in April and land surface for gravity irrigation with SW 7 Difference in high water level in March and land surface for gravity irrigation 8 Difference (m) in land surface and high water level in Mar/Apr for irrigation 9 Storage capacity 10 Proximity to river, canal, ponds, for irrigation 11 Proximity to river, canal, for drainage 12 Maximum inundation depth/land type 13 Maximum inundation depth for > three days in May 14 Maximum inundation depth in September/October Drainage 15 Maximum inundation depth for > one week in September/October 16 Maximum inundation depth for > two weeks in September/October 17 Difference in land surface and low water level in May for drainage 18 Difference in land surface and low water level in September/October for drainage 19 Soil texture Soil 20 Soil pH 21 Soil salinity 22 lowest water salinity during January and highest during April (ppt) gher water 23 Inundation depth/land type 24 Weekly air minimum temperature at stocking 25 Weekly mean minimum air temperature in January Climate 26 Two-week mean air temperature in December and January 27 Cumulative rainfall in July & August Social and 28 Livelihood/asset index economic 29 Technology adoption index
  18. 18. Requirement for aquaculture Extensive Gher based year round brackish water aquaculture Description Shrimp PL is stocked in Feb when there is brackish water adequate and suitable temperature, brackish water Fish is stocked few weeks later. Water is replenished as needed. Harvest starts after 2 month until end of Nov. Minimum air temperature for 1week (C) Minimum salinity (ppt) at PL stocking Land type / Inundation depth Soil texture Acidity (pH) >25 S1 >10 S1 0.5 - 0.7 S1 clay Loam S1 6.5 - 7.5 S1 20 - 25 S2 5 to 10 S2 0.7- 1; 0.3 - 0.5 S2 Loam S1 5.5 - 6.5; 7.5 - 8.5 S2 18 -20 S3 2-5 S3 1 - 1.2; 0 - 0.3 S3 Sandy loam S2 4.5 5.5; 8.5 - 9.5 S3 <18 SN <2 SN > 1.2; no inundation SN Sandy SN <4.5; >9.5 SN S1 = Most Suitable S2 = Suitable S3 = Least Suitable SN = Not Suitable
  19. 19. Water requirements for Aman - Boro Aman - Boro Water quality and availability in dry season Difference Internal Aman - Boro Fresh (< 4dS/m), Month when and availability in wet season(m) in high Water quality storage Description of river water Proximity to water level in ground water capacity in Land use still remain river,Difference (m)and land canal, Mar in land relation to land Description of Land availability and Maximum inundation ponds (m) type(technology) fresh Maximum inundation depth surface andsurface for low water pumping depth area use depth (m) for more than (<4 dS/m) gravity (m) in August level in Sep/Oct for (ML/ha) type(technology) one week in Sep/Oct irrigation (m) drainage Boro rice is seeded Aman HYV rice is around 15 Nov. (MS) transplanted in JulytoAugust, to be Aman 15 Dec (LS). rice is rainfed. Boro harvested by the end rice is irrigated with of November river water (when (Moderate Salinity fresh) oror December zone) with water stored in canal (low saline zone). networks. Yes, < 6 m < 0.1 S1 > No 0.3 S1 = Most Suitable S1 0.2 > 5 < S1 S1 <50 > 1 S2 FebS2 0.2 2.5 S2 – 0.5 - 5 S2 S2 0.5 50-100 - 1 S2 0.5 - 1 S2 S2 S3 Jan S3 0.5 – 0.8 S3 1 - 2.5 S3 S3 0.2 – 0.5 100-300 S3 0.2 - 0.5 SN Yes, 7 -20 0.1 – 0.2 m 0.2 – 0.3 yes, > 20 March S1 SN Dec > SN 0.8 <1 SN < SN >300 0.2 S2 = Suitable S3 = Least Suitable S1 SN >1 < 0.2 S1 S1 S3 S3 SN SN SN = Not Suitable
  20. 20. Groundwater Fresh groundwater (< 4dS/m) Tubewell? Yes Surface water Tubewell depth (m) Month when river water (< 3 dS/m) Storage capacity (ML/ha) Proximity to fresh SW source (m) Shallow Suitability for HYV Boro rice crop S1 <6 No 7 - 20 S2 > 20 Deep S1 S3 Mar Feb S1 2.5 - 5 Dec S2 S3 < 100 S2 S3 < 100 S3 > 100 1 – 2.5 < 100 > 100 2.5 - 5 S2 > 100 Jan S1 > 100 1- 2.5 < 100 SN SN
  21. 21. Groundwater Fresh groundwater (< 4dS/m) Tubewell? Yes Surface water Tubewell depth (m) Month when river water (< 3 dS/m) Storage capacity (ML/ha) Proximity to fresh SW source (m) Shallow Suitability for HYV Boro rice crop S1 <6 No 7 - 20 S2 > 20 Deep S1 S3 Mar Feb S1 2.5 - 5 Dec S2 S2 S3 < 100 S2 S2 S3 < 100 S3 < > 100 1 – 2.5 < 100 < > 100 2.5 - 5 S1 S2 < > 100 Jan S1 < > 100 1- 2.5 < 100 S3 SN SN
  22. 22. Example: Input datasets Min temp – 8th-14th Feb Flood inundation depth Soil salinity Soil texture Water salinity Soil pH
  23. 23. Example: Input datasets Through our partners we have obtained the 2011 population and 2008 agricultural census’ at village level. This is a huge and still untapped resource. Percentage of small farms, <1ha Values in percent Percentage of leased land
  24. 24. Post larvae shrimp stocking… 1-7 days - Feb 22-28 days - Feb 8-15days - Feb 16-21days - Feb 1-7 days - March
  25. 25. Draft maps – not for distribution Ex Domains: Shrimp – Aman system
  26. 26. Draft maps – not for distribution Traditional aquaculture system
  27. 27. Draft maps – not for distribution Ex. Domains: T. Aus – Aman system
  28. 28. Draft maps – not for distribution What is needed for higher accuracy Shrimp Aman Rice
  29. 29. WebGIS and access to data …
  30. 30. Improve access to / use of information Bangladesh is a “data rich environment”, with many institutes, measuring, monitoring and collecting data. And yet too much data remains unused, unknown and at the end of projects it is sometimes lost. Too many new projects go through the same expensive, time consuming and frustrating process of data (re)discovery. A need for more efficient and transparent access
  31. 31. WebGIS to share data and models Source: esri.com The best way to get value from data is to give it away Source: G1 most significant change story
  32. 32. WebGIS to share data and models Data authors/owners publish data on a GIS Server. Via the WebGIS, the data are accessible to: • GIS professionals • Web users • Mobile users source: www.schnellinformatics.com Facilitating open sharing of data and CPWF outputs
  33. 33. WebGIS on the “cloud” We use ESRI ArcGIS Server on an Amazon Elastic Compute Cloud (EC2) instance Always on, always accessible, not dependent on any one partner’s infrastructure Reliable, resizable, cost effective: 100USD/month
  34. 34. Demo system – under construction
  35. 35. Demo system – under construction
  36. 36. Demo system – under construction
  37. 37. Demo system – under construction
  38. 38. Demo system – under construction
  39. 39. Demo system – under construction
  40. 40. Demo system – under construction
  41. 41. What is new/exciting? 1. First cropping system maps of the coastal zone 2. Highly detailed: spatial, temporal and thematic 3. Strong scientific based background for the model 4. Strong partnership in G1 to generate and share data 5. WebGIS to make spatial data from CPWF open to all
  42. 42. Where next in 2014? 1. Completion of data sets and extrapolation domains 2. Assessment of extrapolation domain maps via focus group discussions with local planning and management groups in the coastal zone 3. High resolution current and future land use maps completed and validated 4. Add more datasets and functionality to webGIS and make it more user friendly
  43. 43. Thank you
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