The area between the ridges is flooded during irrigation. BORDER RIVERS (NSW) CATCHMENT IRRIGATION PROFILE 1 1. FLOOD IRRIGATION includes several methods: Border strip, basin, contour or bench border irrigation, flooding from contour ditches, wild flooding, and border ditch. 2.2.2 Border irrigation. 0000012231 00000 n `�Ț`�Ț`�Ț`�Ț`��MαE0pdM0pdM0pdM0p� ��b�+��8 �� 2���- �ș�2�r�Gf�+�0 2�� �șA2�� �șa� ��W`� �%2` ϑ50��Ț�sdM1L5@@�L�-2��f�̰Ef�"sl�y��Wdb`��-� �8zABh��[d�-2��g�,pE&��[d�-2� �r�`9G��-2��g�,pEG��"l�I��[d�-2���r 6W7f�,pE���"l�I��[d�-2��e��-h� ǃ ǽ7�3E&�"�l�)��4[d�-2��c�̳EƖ,[�†��P��"Sl�i��[d�-2��g�,pE��"c��-�a��܂�#�L���,[d�-2�Y���3E&�"�l��� ϖ�c�OՉ�0Od�-2�Y��l�`�L�E��"�l�����ƃ�,�y��O`r�� The Border Method of Irrigation. %�쏢 The irrigated areas between dikes may be 3–30 m wide and up to 400 m long. The use of surface irrigation on moderately. 8e - Graded Border Irrigation Application Efficiency Analysis - Example (PDF; 28 KB) 8f - Field Irrigation Evaluation Example Guide - Form (PDF; 106 KB) 8g - Measurement of Soluble Salts (PDF; 21 KB) Most recently, furrow irrigation has become important because of the high cost of energy in pressurized irrigation … 8.2 Border irrigation As in level-basin irrigation, design issues in border irrigation generally have to do with finding the optimum combination of design variables, notably, the length, flow rate, and cutoff time. Another major variable, however, that does not appear in basin irrigation, is the slope of the field. Lr���\���,W`L-ʶ�ؔi�!��m�#2��d�L�E��"3l�Y��[d�-2� �r@ʶ��d��@vb�g��adB\|pٿ>����^��/3�+�6\��Kjc�?���F@��1������oN���/�)���y*�1�nͿWqj�$�����!��Tu��H U������{�߱��mx0e�=�J�q�°�f��t#���J���?�ߔ;u��gW�+ 0000006022 00000 n ��X�g[ }��zt*L�5��r�^�ȈZA��ܵ�S�9T`c�R2z�����=U���". Introduction Although recession flow during irrigation has long been a subject of theoretical and experi- mental research, relatively little is known about it. 0000001409 00000 n 0000004318 00000 n 0000001387 00000 n Introduction to Surface Irrigation System The term 'surface irrigation' refers to a broad class of irrigation methods in which water is distributed over the field by overland flow. The computation proceeds as follows (33.18) Example 33.1: Design a border irrigation system for the following conditions: Field length, L = 200 m. Field width, W = 100 m, H�|UM��8�����'��3;Zi����V{ �I�ҭ��[�D��ZI�zU��Ճ" The general difference is that basin irrigation involves applying water to a nearly level field and may include ponding for extended time periods. Figure 4 illustrates a typical border configuration in which a field is divided into sloping borders. In the Punjab, border irrigation is used to irrigate wheat crops grown over 90% of the cultivated area. 0000007779 00000 n Surface Irrigation Methods. 0000004296 00000 n It is by far the most common form of irrigation throughout the world and has been practiced in many areas virtually unchanged for thousands of years.. 0000003353 00000 n *)�LT i�L��“ؾ���@�v�� �^�g,����8����wX�2�aY�������F@q 6g``���t͐e�-����l��};�#��j�0 �PD endstream endobj 201 0 obj 246 endobj 173 0 obj << /Type /Page /MediaBox [ 0 0 465.35999 679.43958 ] /Parent 167 0 R /CAPT_Info << /R [ 0 5662 0 3878 ] /S [ 0 2831 0 1939 ] /Rz [ 300 300 300 300 0 0 ] /SK (00000130)>> /Contents [ 177 0 R 179 0 R 181 0 R 187 0 R 191 0 R 193 0 R 195 0 R 197 0 R ] /Resources << /XObject << /Im16 199 0 R >> /Font << /F2 175 0 R /F10 189 0 R /F7 186 0 R /F15 184 0 R >> /ProcSet [ /PDF /Text /ImageB ] >> /CropBox [ 0 0 465.35999 679.43958 ] /Rotate 0 >> endobj 174 0 obj << /Type /FontDescriptor /FontName /TimesNewRomanPSMT /FontBBox [ -250 -250 1009 1000 ] /Flags 34 /CapHeight 712 /Ascent 891 /Descent 216 /StemV 73 /ItalicAngle 0 /XHeight 498 /Leading 42 /AvgWidth 401 /MaxWidth 1175 >> endobj 175 0 obj << /Type /Font /Subtype /TrueType /BaseFont /TimesNewRomanPSMT /FirstChar 0 /LastChar 255 /Encoding /WinAnsiEncoding /FontDescriptor 174 0 R /Widths [ 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 778 250 333 408 500 500 833 778 180 333 333 500 564 250 333 250 278 500 500 500 500 500 500 500 500 500 500 278 278 564 564 564 444 921 722 667 667 722 611 556 722 722 333 389 722 611 889 722 722 556 722 667 556 611 722 722 944 722 722 611 333 278 333 469 500 333 444 500 444 500 444 333 500 500 278 278 500 278 778 500 500 500 500 333 389 278 500 500 722 500 500 444 480 200 480 541 778 500 778 333 500 444 1000 500 500 333 1000 556 333 889 778 611 778 778 333 333 444 444 350 500 1000 333 980 389 333 722 778 444 722 250 333 500 500 500 500 200 500 333 760 276 500 564 333 760 500 400 549 300 300 333 576 453 250 333 300 310 500 750 750 750 444 722 722 722 722 722 722 889 667 611 611 611 611 333 333 333 333 722 722 722 722 722 722 722 564 722 722 722 722 722 722 556 500 444 444 444 444 444 444 667 444 444 444 444 444 278 278 278 278 500 500 500 500 500 500 500 549 500 500 500 500 500 500 500 500 ] >> endobj 176 0 obj 841 endobj 177 0 obj << /Filter /FlateDecode /Length 176 0 R >> stream Activity 1. ���/������F�0�A����� �� �Ϡ���$�)�p���.^(=ޯ?�!y��c.t��>1N��=fJg��� ?h����齒��:��)Ǎ�^EC�c#�܎e� ���K�Sj�酻�n!i���W����s��b}�&$W6�������]��V)��x5ŗ?v6��������1��N)���@?N�����NiH�,�^�i�s}��/Λ7ߨϡ ^����q\�tN��bo9!��+��(�BC*i�Q�!�v� Surface irrigation is often referred to as flood irrigation, implying that the water distribution is uncontrolled and therefore, inherently inefficient. 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