border irrigation pdf

FLOOD IRRIGATION includes several methods: Border strip, basin, contour or bench border irrigation, flooding from contour ditches, wild flooding, and border ditch. BORDER RIVERS (NSW) CATCHMENT IRRIGATION PROFILE 1 1. 6.2. 5 Maximum, minimum, and proposed initial q0 Table 2 Maximum allowable inflow rates for irrigation borders (National Engineering Handbook 1974) qmin must be used. As the Border irrigation can be viewed as an extension of basin irrigation to sloping, long rectangular or contoured field shapes, with free draining conditions at the lower end. 5 ing a slight change in the borders, so that the latitude as regards rotation is rather wide. 0000009858 00000 n ��/��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� 0000007521 00000 n Consequently, in border Another major variable, however, that does not appear in basin irrigation, is the slope of the field. Jx\_�5LHk'�~��r(��\�[�TPE��F��U��?o��} ��;B��uT�*5XV�0�뛏 ��l.��\��j��A�� IKzLV�^-�%vO�GS{#� ��&b3��?��EZ7�I��eX�ӀƵ�\��b�Ƹ1u�"�r��>*��q�:��+�L�چC�Ы�X�p�1��6|�� D�. 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�+ 29 0 obj 0000013989 00000 n Introduction Although recession flow during irrigation has long been a subject of theoretical and experi- mental research, relatively little is known about it. The latter is used mainly to irrigate row crops and orchards. Surface Irrigation Methods Their main classification of surface methods is as follows: (1)Free flooding (2)Border flooding (3) Check flooding (4) Basin flooding (5) Furrow irrigation method (6) Drip irrigation method. Border irrigation is a type of surface irrigation where the field is divided into strips separated by border ridges running down the gradient of the field. Pedosphere 20(4): 419–426, 2010 ISSN 1002-0160/CN 32-1315/P c 2010 Soil Science Society of China Published by Elsevier Limited and Science Press Eﬀect of Sprinkler and Border Irrigation on Topsoil Structure in Winter Wheat Field∗1 SUN Ze-Qiang1, 2∗, KANG Yao-Hu and JIANG Shu-Fang2 1Soil and Fertilizer Institute, Shandong Academy of Agricultural Sciences, Jinan 250100 (China) 10. 0000001047 00000 n 0000003375 00000 n The Border Method of Irrigation. }��z2+��z��b@�QN4w B� A flow is introduced at one edge of the field and 0000013967 00000 n Bunds or ridges are constructed around the areas forming basin within which irrigation water may be controlled. ); qinshujing2010@126.com (S.Q. `�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�� Soil erosion can take the form of ... in the outer part of center pivot systems, excessive furrow or border inflows, and uncontrolled tailwater or runoff. The irrigated areas between dikes may be 3–30 m wide and up to 400 m long. trailer << /Size 202 /Info 166 0 R /Root 172 0 R /Prev 463274 /ID[<4df00a85980b859ae2a27c6d1e194263><4df00a85980b859ae2a27c6d1e194263>] >> startxref 0 %%EOF 172 0 obj << /Type /Catalog /Pages 165 0 R /Outlines 152 0 R >> endobj 200 0 obj << /S 181 /O 276 /Filter /FlateDecode /Length 201 0 R >> stream 0000012209 00000 n H�|UM��8��'��3;Zi��V{ �I�ҭ��[�D��ZI�zU��Ճ" To optimize the design of border and check basin irrigation in the slopping land, field dimensions, slope and soil informa- tion were collected from 3 blocks of langha watershed of 0000008998 00000 n About this page ... Basin and border irrigation systems are similar in that both involve a uniform sheet of water flowing over the soil. The border irrigation concept is to flush a large volume of water over a relatively flat field surface in a short period of time. This study aims to simulate border irrigation systems using the SIRMOD (surface irrigation simulation, evaluation and design, developed by Utah State University, Logan, UT, USA) software package under open- and closed-end conditions. 0000013122 00000 n ��X�g[ }��zt*L�5��r�^�ȈZA��ܵ�S�9T`c�R2z��=U��". border irrigation basics Activity 1. 0000007779 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. 0000006022 00000 n 2.2.2 Border irrigation. 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.. , in border the border method of irrigation m long the most soil! Become important because of the field and 10 certain areas 10 to 100 sq metre or more. 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