Crops are highly susceptible to drought in sloping land. Due to its good adaptability\nto complex terrain, sprinkler irrigation is one of the commonly used methods for sloping land.\nTo improve water application uniformity for sprinkler irrigation on sloping land, an experiment was\nconducted on an artificial slope to determine the effects of pulsating versus constant pressure on\nsprinkler flow rate, radius of throw, water distribution pattern, and water application uniformity.\nCompared with sprinkler flow rate and water distribution uniformity at constant pressure, sprinkler\nflow rate was not reduced, but water distribution uniformity for a single sprinkler was improved\ndue to the decreased uphill throw, downhill throw and the ratio of downhill throw to uphill throw\nat pulsating pressure. The Christiansen Uniformity Coefficient (CU) value of water distribution\nfor a single sprinkler at pulsating pressure was about 10% higher than that of constant pressure.\nWhen water distribution of single sprinkler overlapped with rectangular arrangement, CU values\nfor pulsating pressure were on average 4.06% higher than those for constant pressure with different\nsprinkler spacings. Thus, pulsating pressure is recommended for use in sprinkler irrigation on sloping\nland to improve water application uniformity.
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