Methodology for DSS Development & Demonstration
| 1 | Surface runoff estimation | SCS curve number method/ Infiltration method/ Rational method/SWAT model |
| 2 | Soil and water conservation measures | |
| i. Biological/vegetative SWC measures | 1• Getting information on rainfall, soil type, area and slope etc. from LRI 2• Selection of location specific plant species 3• Estimation of vertical interval (VI) and horizontal interval (HI) for vegetative barrier and calculation of plant spacing (row to row and plant to plant) 4• Calculation of the cost of materials including gap filling, transportations to the site, labour for transplanting etc by standard procedure |
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| ii. Contour and graded bunding | 1• Getting information on rainfall, soil type and its characteristics, area and slope, vegetation from LRI 2• Bund spacing (VI and HI) using Ramser Formula/ Cox’s Formula 3• Bund section -Top width and side slope from soil type, bund height using standard calculation procedure 4• Bund length, Total quantity of earthwork and cost using standard calculation procedure |
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| iii. Bench terracing | 1• Deciding suitability and type of bench terracing based on rainfall condition, soil condition, slope, crops to be grown and other parameters 2• Estimation of terrace parameters (Terrace width, spacing, depth of cut, terrace cross section, batter slope, size of shoulder bund etc.) 3• Deciding suitable terrace gradient by getting peak runoff from standard runoff estimation 4• Getting volume of earthwork and cost by normal computation 5• Estimation of runoff using SCS curve number method and designing to hold upto 70 % runoff |
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| iv. Trenching in non-arable lands | 1• Estimation of cross sectional area and volume of Trench based on the volume of runoff to hold 2• Deciding spacing using standard calculation procedure 3• Calculation of volume of earthwork and cost using normal procedure |
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| v. Loose boulder check dam | 1• Getting information on rainfall, soil type, slope, stream order, availability of boulders, catchment area, prevailing land use 2• Deciding the upstream and downstream slope of the structure 3• Calculation of depth of flow, top width based on the peak runoff to be handled 4• Calculation of volume of boulders required and cost using normal procedure |
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| 3 | Rain water harvesting structures | |
| i. Farm pond | 1• Estimating surface runoff from rainfall details like duration, intensity and AMC conditions, land use and land cover, soil type, slope etc 2• Deciding the pond volume through DSS involving catchment-command-storage relations and available runoff and crops to be grown 3• The size and dimensions from the volume of water to be stored 4• Cost of the structure through normal calculating procedure and using standard rates |
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| ii. Check dam | 1• Following standard Hydrologic, Hydraulic and structural design procedure 2• Cost estimation of the structure through standard methodology after deciding the dimensions of the different components of the structure and using prevailing market rates |
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| 4 | Surface hydrology map/Atlas at micro watershed scale | 1• Deciding the land management unit 2• Estimating the runoff using standard runoff estimation methods 3• Mapping through GIS using standard methodology |
| 5 | Soil moisture balance | Monitoring of soil moisture at specified intervals and balancing after considering the rainfall and irrigation given during the balancing period |
| 6 | In-situ soil moisture conservation practices | 1• As per the standard recommendation by the ICAR-IISWC 2• Details of all the package of practices in Odiya language in a understanding ways |
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