水稻灌区水量转化模型及其模拟效率分析
为更合理地定量描述和研究分析南方丘陵水稻灌区水量及其转化关系,在已构建的水稻灌区分布式水量平衡模型(改进SWAT模型)的基础上进一步从模型模拟结构、稻田水量平衡要素(蒸发、降雨、渗漏和灌排)模拟和渠系渗漏影响等方面对模型予以改进完善,以期能合理体现灌区特征,充分描述灌区水文过程,提高模拟精度,为灌区水量转化和节水潜力分析研究提供有效手段。文中将完善相关改进的模型应用于漳河灌区典型流域,并将其模拟结果与原SWAT模型模拟结果比较分析。结果表明:改进SWAT模型径流模拟总量与实测值基本一致,相对误差在±10.0%之内;Nash-Suttclife效率系数达到0.57~0.76;评价系数均在0.85...
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Published in | Nong ye gong cheng xue bao Vol. 27; no. 1; pp. 22 - 28 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
武汉大学水资源与水电工程科学国家重点试验室,武汉,430072
2011
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Subjects | |
Online Access | Get full text |
ISSN | 1002-6819 |
DOI | 10.3969/j.issn.1002-6819.2011.01.004 |
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Abstract | 为更合理地定量描述和研究分析南方丘陵水稻灌区水量及其转化关系,在已构建的水稻灌区分布式水量平衡模型(改进SWAT模型)的基础上进一步从模型模拟结构、稻田水量平衡要素(蒸发、降雨、渗漏和灌排)模拟和渠系渗漏影响等方面对模型予以改进完善,以期能合理体现灌区特征,充分描述灌区水文过程,提高模拟精度,为灌区水量转化和节水潜力分析研究提供有效手段。文中将完善相关改进的模型应用于漳河灌区典型流域,并将其模拟结果与原SWAT模型模拟结果比较分析。结果表明:改进SWAT模型径流模拟总量与实测值基本一致,相对误差在±10.0%之内;Nash-Suttclife效率系数达到0.57~0.76;评价系数均在0.85以上。原SWAT模型径流模拟总量仅占实测值的30%~40%;Nash-Suttclife效率系数均低于0.50,甚至出现负值;评价系数在0.76~0.91之间。改进SWAT模型水稻蒸发蒸腾量模拟值与试验值相对误差仅为-4.76%,评价系数为0.93,Nash-Suttclife效率系数高达0.85;而原SWAT模型模拟值与试验值相对误差高达-38.49%,评价系数为0.73,Nash-Suttclife效率系数为负值。可见,改进SWAT模型因全面考虑水稻灌区水文特征,其模拟效率明显优于原SWAT模型,更适合于南方丘陵区水稻灌区的水文循环模拟。 |
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AbstractList | P333.1; 为更合理地定量描述和研究分析南方丘陵水稻灌区水量及其转化关系,在已构建的水稻灌区分布式水量平衡模型(改进SWAT模型)的基础上进一步从模型模拟结构、稻田水量平衡要素(蒸发、降雨、渗漏和灌排)模拟和渠系渗漏影响等方面对模型予以改进完善,以期能合理体现灌区特征,充分描述灌区水文过程,提高模拟精度,为灌区水量转化和节水潜力分析研究提供有效手段.文中将完善相关改进的模型应用于漳河灌区典型流域,并将其模拟结果与原SWAT模型模拟结果比较分析.结果表明:改进SWAT模型径流模拟总量与实测值基本一致,相对误差在±10.0%之内;Nash-Suttclife效率系数达到0.57~0.76;评价系数均在0.85以上.原SWAT模型径流模拟总量仅占实测值的30%~40%;Nash-Suttclife效率系数均低于0.50,甚至出现负值;评价系数在0.76~0.91之间.改进SWAT模型水稻蒸发蒸腾量模拟值与试验值相对误差仅为-4.76%,评价系数为0.93,Nash-Suttclife效率系数高达0.85;而原SWAT模型模拟值与试验值相对误差高达-38.49%,评价系数为0.73,Nash-Suttclife效率系数为负值.可见,改进SWAT模型因全面考虑水稻灌区水文特征,其模拟效率明显优于原SWAT模型,更适合于南方丘陵区水稻灌区的水文循环模拟. 为更合理地定量描述和研究分析南方丘陵水稻灌区水量及其转化关系,在已构建的水稻灌区分布式水量平衡模型(改进SWAT模型)的基础上进一步从模型模拟结构、稻田水量平衡要素(蒸发、降雨、渗漏和灌排)模拟和渠系渗漏影响等方面对模型予以改进完善,以期能合理体现灌区特征,充分描述灌区水文过程,提高模拟精度,为灌区水量转化和节水潜力分析研究提供有效手段。文中将完善相关改进的模型应用于漳河灌区典型流域,并将其模拟结果与原SWAT模型模拟结果比较分析。结果表明:改进SWAT模型径流模拟总量与实测值基本一致,相对误差在±10.0%之内;Nash-Suttclife效率系数达到0.57~0.76;评价系数均在0.85以上。原SWAT模型径流模拟总量仅占实测值的30%~40%;Nash-Suttclife效率系数均低于0.50,甚至出现负值;评价系数在0.76~0.91之间。改进SWAT模型水稻蒸发蒸腾量模拟值与试验值相对误差仅为-4.76%,评价系数为0.93,Nash-Suttclife效率系数高达0.85;而原SWAT模型模拟值与试验值相对误差高达-38.49%,评价系数为0.73,Nash-Suttclife效率系数为负值。可见,改进SWAT模型因全面考虑水稻灌区水文特征,其模拟效率明显优于原SWAT模型,更适合于南方丘陵区水稻灌区的水文循环模拟。 |
Author | 王建鹏 崔远来 |
AuthorAffiliation | 武汉大学水资源与水电工程科学国家重点试验室,武汉430072 |
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Author_FL | Wang Jianpeng Cui Yuanlai |
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DocumentTitleAlternate | Modified SWAT for rice-based irrigation system and its assessment |
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Keywords | 蒸发蒸腾 SWAT水文模型 灌溉 渗漏 降雨 计算机模拟 水稻灌区 排水 |
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SubjectTerms | SWAT水文模型 排水 水稻灌区 渗漏 灌溉 蒸发蒸腾 计算机模拟 降雨 |
Title | 水稻灌区水量转化模型及其模拟效率分析 |
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