| 引用本文: | 郭珈玮,周 慧,史海滨,等.基于HYDRUS-2D盐荒地干排盐作用模拟研究[J].灌溉排水学报,2023,42(S1):206-212. |
| GUO Jiawei,ZHOU Hui,SHI Haibin,et al.基于HYDRUS-2D盐荒地干排盐作用模拟研究[J].灌溉排水学报,2023,42(S1):206-212. |
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| 摘要: |
| 【目的】探究河套灌区典型区域在干排作用下的排盐量及耕地盐分向荒地运移所需的容泄区。【方法】于2017—2018年开展田间定位监测试验，建立二维饱和-非饱和土壤水盐迁移模型，利用HYDRUS-2D模型研究向日葵农田灌溉制度下的土壤盐分向荒地的迁移量及迁移范围。【结果】耕地与所需承载盐分的容泄区面积之比介于1.48~1.53，耕地全年向荒地的排盐量1.98~2.06 t。【结论】耕地盐分向荒地运移所需的容泄区范围取决于耕地面积及其占整个区域面积的比例，研究结果可为调节区域水盐平衡和盐荒地土壤改良提供科学依据。 |
| 关键词: 灌溉；盐荒地；排盐量；数值模拟；HYDRUS-2D模型 |
| DOI：10.13522/j.cnki.ggps.2023186 |
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| Analysis of Dry Discharge Effect of Salt Wasteland Based on HYDRUS-2D |
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GUO Jiawei, ZHOU Hui, SHI Haibin, LI Hongfang
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1. National Field Scientific Observation and Research Station of Grassland Ecohydrology at the Northern Foot of Yinshan Mountain, Inner Mongolia, China Institute of Water Resources and Hydropower Research, Hohhot 010018, China; 2. College of Agronomy,
Inner Mongolia Agricultural University, Hohhot 010019, China; 3. College of Water Conservancy, Civil Engineering,
Inner Mongolia Agricultural University, Hohhot 010018, China
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| Abstract: |
| 【Objective】In order to explore the salt discharge and the required discharge area under the action of dry discharge in the typical area of Hetao Irrigation District, sunflower farmland was selected as the research object. 【Method】The positioning monitoring experiment was carried out for two consecutive years in 2017 and 2018, and two-dimensional saturated-unsaturated soil was established. The numerical model of water and salt migration uses HYDRUS-2D quantitative simulation to simulate the migration and migration range of soil salinity to wasteland under the crop irrigation system. 【Result】The results show that the ratio of the area of the sunflower field to the area of the required salt bearing zone is 1.48-1.53, and the annual salt discharge is 1.98-2.06 t. The analysis further indicates that the extent of the containment area required for the movement of arable land salinity to the wasteland depends to some extent on the area of cultivated land or its proportion of the entire area. 【Conclusion】The simulated values of the model are in good agreement with the measured values, which can better reflect the real situation of the test. The results of this study provide a scientific basis for regulating regional water and salt balance and improvement of salt wasteland. |
| Key words: irrigation; salt wasteland; soil water and salt transport; numerical simulation; HYDRUS-2D model |
