8/30/2022 Santosh Kumar Garg Irrigation Engineering and Hydraulic Structures 1 8/30/2022 2 8/30/2022 3 8/30/2022 I. Surface Irrigation II. Sub-surface Irrigation 4 8/30/2022 Walker, 1989 I. Surface Irrigation II. Sub-surface Irrigation Walker, 1989 I. Surface Irrigation II. Sub-surface Irrigation 5 8/30/2022 I. Surface Irrigation II. Sub-surface Irrigation I. Surface Irrigation Santosh Kumar Garg Irrigation Engineering and Hydraulic Structures II. Sub-surface Irrigation 6 8/30/2022 I. Surface Irrigation Santosh Kumar Garg Irrigation Engineering and Hydraulic Structures II. Sub-surface Irrigation I. Surface Irrigation II. Sub-surface Irrigation 7 8/30/2022 I. Surface Irrigation II. Sub-surface Irrigation I. Surface Irrigation Santosh Kumar Garg Irrigation Engineering and Hydraulic Structures II. Sub-surface Irrigation 8 8/30/2022 I. Surface Irrigation II. Sub-surface Irrigation I. Surface Irrigation II. Sub-surface Irrigation 9 8/30/2022 I. Surface Irrigation II. Sub-surface Irrigation I. Surface Irrigation II. Sub-surface Irrigation 10 8/30/2022 Soil Development and Layering 11 8/30/2022 Sand Sandy loam Loam Clay loam Silt loam Clay 12 8/30/2022 Water Content Total Water Potential 13 8/30/2022 • Va 𝐕𝐚 = 𝟎 𝐕𝐯 = 𝐕𝐰 Vv • Vw Wa Vs Ws 𝐕𝐰 = 𝟎 𝐕𝐯 = 𝐕𝐚 V Vs Vw Va Vv 𝐞 𝟏+𝐞 • 𝐕𝐯 𝐕𝐬 • 𝐕𝐯 𝐕 14 8/30/2022 • • 𝐕𝐰 𝐕𝐯 𝛚𝐆𝐬 𝐞 𝛄 • 𝐖 𝐕 • 𝛚 𝛄𝐝 𝛄𝐝 𝐖𝐰 𝐖𝐬 𝐆𝐬 𝛄𝐰 𝟏+𝐞 𝐖𝐬 𝐕 Va Vv Vw Wa Vs Ws V 15 8/30/2022 • • 𝛄 𝛄𝐝 𝟏 + 𝛚 𝛄𝐬𝐚𝐭 𝐆𝐬 +𝐞 𝛄𝐰 𝟏+𝐞 • 𝛒 𝟏+ 𝛚 𝐆𝐬 𝛒𝐰 𝟏+𝐞 𝛒𝐝 𝐆𝐬 𝛒 𝐰 𝟏+𝐞 • • 𝛒𝐬𝐚𝐭 (𝐆𝐬 +𝐞)𝛒𝐰 𝟏+𝐞 16 8/30/2022 ³ ³ 17