| 基于原状土蒸渗仪的潜水蒸发昼夜变化及差异性比较 |
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| 引用本文： | 顾南,王振龙,蒋东进,吕海深,胡永胜,朱永华,杨秒.基于原状土蒸渗仪的潜水蒸发昼夜变化及差异性比较[J].水文,2019,39(2):44-48. |
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| 作者姓名： | 顾南 王振龙 蒋东进 吕海深 胡永胜 朱永华 杨秒 |
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| 作者单位： | 河海大学;安徽省(水利部淮委)水利科学研究院;江苏南水水务科技有限公司; |
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| 基金项目： | 国家重点研发计划项目“河湖沼系统生态需水保障技术体系及应用”(2017YFC0404504)；国家自然科学基金项目(41830752,41571015)； |
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| 摘 要： | 为探究潜水蒸发昼夜变化及差异,利用五道沟水文实验站蒸渗仪群,进行了砂姜黑土和黄潮土两种代表土壤裸地及种植小麦和玉米三种情景下的实验。结果表明:有作物时,不同需水阶段昼夜潜水蒸发差异明显。需水大时,受蒸腾作用影响,潜水蒸发较大,两种土壤均为白天大于夜间。玉米生长初期需水小,但夏季白天气温较高,均为白天大于夜间。而小麦生长初期,冬季气温低,砂姜黑土昼夜差异不明显,各有大小,黄潮土则为夜间较大。裸土时,黄潮土受夜间水汽凝结及白天毛管断裂影响明显,夜间会大于白天。砂姜黑土则反之。
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| 关 键 词： | 潜水蒸发 昼夜变化 蒸渗仪 |
| 收稿时间： | 2018/2/20 0:00:00 |
Variation and Comparison of Diurnal Phreatic Evaporation Based on Undisturbed Soil Lysimeters |
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| GU Nan,WANG Zhenlong,JIANG Dongjin,LV Haishen,HU Yongsheng,ZHU Yonghu,YANG Miao.Variation and Comparison of Diurnal Phreatic Evaporation Based on Undisturbed Soil Lysimeters[J].Hydrology,2019,39(2):44-48. |
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| Authors: | GU Nan WANG Zhenlong JIANG Dongjin LV Haishen HU Yongsheng ZHU Yonghu YANG Miao |
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| Abstract: | To understand the differences and changes of diurnal phreatic evaporation, the lysimeters at the Wudaogou hydrologicalexperimental station were applied to test in bare land and planting wheat or corn in lime concretion black soil and fluvo-aquicsoil. The results show that diurnal evaporation varies obviously at different growth stages when there are planting crops. When thewater demand is large, the value of phreatic evaporation is great. Two kinds of soils both show that the value in daytime is greaterthan that at night. At the initial growth stage, water requirements of crop are small, but the temperature in daytime is higher thanthat at night. In the early growth stage of wheat, the temperature is low in winter and diurnal difference of black soil is notobvious while that of fluvo-aquic soil is obvious at night. In bare land, fluvo-aquic soil is greatly affected by condensation of watervapor and breakage of daytime capillaries, and the value at night is greater than that in daytime. However, black soil is in verse. |
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| Keywords: | phreatic evaporation diurnal variation lysimeter |
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