During percolation, the grains are fixed, but water is flowing past them, which produces the same drag force. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. %PDF-1.4 %���� By definition, the amount of DP is also a function of a crop’s effective root depth. Pipe Flow. Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. It also is import-ant when quantifying crop water use (evapotranspiration), irrigation requirements (IR), recharge analyses, nutrient and micronutrient movement in the soil profile and below the crop root zone, and other analyses. Deep percolation of rainfall and irrigation water beneath the root zone averages about 7 inches per year (Johnson 2008; Wagner & Bonsignore 1999). © Clotylde, Flickr, CC by-nc-nd 2.0. 0000007745 00000 n Previous 5 Terms: The processes involved in the replenishment of water to the zone of saturation. 429 0 obj <>stream 0000041140 00000 n h�b```b``����� �� ̀ ��@Q� B,jdd���^��(���\���&P8"��3E��ɕ�����_��,ب�)2����l��r���ۥ�_̀s�E�"d��^�HeBt�- ����������� �EP�ť�2�͡b`P)��((�k���Pd2s�j@� 6C�A���Ae��'� �R s;����9��^23px0�0p7H8�0�1�6H?���b�p��l��� ��w�TB�,'�E�K��[0�`Hp`���XjB6��4��U ���6/��� 7۸��\�d�2F �` �l6 La percolation désigne une traversée lente d'un milieu, comme des sédiments, par un liquide ou plus rarement un gaz. How are Western water districts managing groundwater basins? All contents of the lawinsider.com excluding publicly sourced documents are Copyright © 2013-, High global warming potential hydrofluorocarbons. ?���a�A�1���O��F�����t�پn�nr�������]ߎ�r��Mr����Ţvm�Ls����~(Jۼ�]�t���s�Z��]�L��=���Cz,�oc�Ʈw�6�GW���'�R?�ʭ׮MG{З��uJ��۞��]�ۓ�����mH����0͹M�aߤq߿�bU�o�Vo�[�o���\s����ޏ�j�b7W�jUEY[��^��&�A�~F��q]Q���c�so�P�U�m1�L�g�K�|}m1M��5�l1M/[L�Öb��|��������=��j���Z��^>RGh2{0{2{0{fg�i�{�{2{0y. %%EOF The replenishment of water in the ground, e.g., through injection or infiltration from trenches outside the construction area. Deep Percolation Loss In hydrologic terms, water that percolates downward through the soil beyond the reach of plant roots. In general, the amount of DP for deep-rooted crops (e.g., corn, sorghum) is lower than for short-rooted crops. Percolation of irrigation water past the plant root zone to regions of deeper ground-water aquifers'. What is what? Regain d’émissions de gaz à effet de serre dans les pays riches, Lire la suite : Définition | Diatomée | Futura Planète, des millions de technosignatures détectées, Charte de protection des données personnelles. 388 0 obj <> endobj GWHT . 0000040522 00000 n 0000003264 00000 n 0000012553 00000 n CallUrl('www>cagenterprises>comhtml',0), index produced by the NOAA/USDA (Department of Agriculture) Joint Agricultural Weather Facility. La percolation désigne une traversée lente d'un milieu, comme des sédiments, par un liquide ou plus rarement un gaz. Initial groundwater height (m). highest stream velocity. recharge, the Deep Percolation Model, was modularized for inclusion into the U.S. Geological Survey’s Modular Modeling System. Stream-Flow Analogy. Wikipedia Dictionaries. endstream endobj 428 0 obj <>/Filter/FlateDecode/Index[45 343]/Length 34/Size 388/Type/XRef/W[1 1 1]>>stream 0000010575 00000 n This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. 0 Steady-state groundwater flow and the height of the water table are linearly proportional. 0000039509 00000 n The environmental effects of deep percolation can be minimized by timely application of fertilizers in amounts that just meet crop needs, by minimizing deep percolation through good irrigation design and management, and by applying pesticides several days before irrigation. https://encyclopedia2.thefreedictionary.com/Deep+percolation. Animaux et végétaux peuvent-ils vivre dans un milieu aquatique pollué ? Elle se fait majoritairement sous l'effet de la pesanteur, donc de haut en bas. Percolation is a process that replenishes aquifers, and, like California, many regions are beginning to treat aquifers as precious natural water storage infrastructure that can be managed for water security. 0000003152 00000 n Deep percolation The term 'Deep percolation' as it applies to the area of reclamation can be defined as ' The movement of water by gravity downward through the soil profile beyond the root zone; this water is not used by plants. 0000034911 00000 n 388 42 means the movement of water downward through the soil profile below a plant's effective rooting zone. The term 'Deep percolation' as it applies to the area of reclamation can be defined as ' The movement of water by gravity downward through the soil profile beyond the root zone; this water is not used by plants. The model was modularized in order to facilitate estimation of ground-water recharge under a large range in climatic, landscape, and land-use and land-cover conditions. English Wikipedia - The Free Encyclopedia. Intéressé par ce que vous venez de lire ? 0000003371 00000 n Recharge is the primary method that water enters an aquifer. The fraction of percolation from the root zone which recharges the deep aquifer. lowest stream velocity. 0000004638 00000 n Figure 02: Percolation. 0000016983 00000 n 0000000016 00000 n low velocity. Thus, a good knowledge of the ef-fective root-zone depth is needed for accurate determination of DP. Table 1--Components of the soil water balance, precipitation, irrigation, Due to the difficulty of measuring the amount of, In this case for treatment T6, rainfall was not used effectively and was lost as, The use of a water dynamics model allows the long term evaluation not only of evaporation, and transpiration flows but also, A little improvement was seen when 1% bentonite was mixed in 2.54 cm depth, for this case water traversed 32 m (half length) and water, Where surface water is used for irrigation, a consequence of applying less water is that groundwater recharge is diminished because of a reduction in, Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content, Managed winter flooding of alfalfa recharges groundwater with minimal crop damage, Simulation of soil water balance and partitioning of evapotranspiration of maize grown in two growing seasons in Southern Brazil/Simulacao do balanco hidrico do solo e particionamento da evapotranspiracao do milho cultivado em duas epocas de semeadura no Sul do Brasil, Effect of subsurface drainage on water balance and water table in poorly drained paddy fields, MODELING DEFICIT IRRIGATION EFFECTS ON MAIZE TO IMPROVE WATER USE EFFICIENCY, Water balance of a dairy loafing lot using geotextile and its impact on water quality, Water losses in the Patagonian steppe: a modelling approach. 0000010660 00000 n 0000016045 00000 n 0000003959 00000 n The design application rate is a function of: Evaporation rate Precipitation rate Deep percolation rate Macro Nutrient loading (N,P,K) TDS Other constituent loading limitations Peak design flow from reclamation facility Developing the design application rate is an iterative process. 0000001761 00000 n Deep percolation (DP) is an important variable in hy-drologic cycle and water balance analyses. 0000012068 00000 n He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English".


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