| 引用本文: | 佟长福,韦晨阳,丁邵宇,等.达拉特旗灌溉用水效率指标体系空间格局及影响因素研究[J].灌溉排水学报,2026,45(8):136-144. |
| Tong Changfu,Wei Chenyang,Ding Shaoyu,et al.达拉特旗灌溉用水效率指标体系空间格局及影响因素研究[J].灌溉排水学报,2026,45(8):136-144. |
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| 摘要: |
| 【目的】分析达拉特旗灌溉用水效率指标体系的空间格局及主要影响因素。【方法】以达拉特旗42个样点灌区为研究对象，选取灌溉水利用效率、渠系水利用效率和田间水利用效率3项指标，采用空间自相关分析、半变异函数拟合、克里金插值和GWR模型，研究灌溉用水效率指标体系及其影响因素的空间分异特征。【结果】①灌溉水利用效率在约26 km范围内以正相关为主，29 km以后转为负相关；渠系水利用效率在约57 km范围内保持正相关，约64 km附近由正转负；田间水利用效率正相关持续距离最长，约70.51 km。灌溉水利用效率、渠系水利用效率和田间水利用效率3项指标的最优半变异函数模型均为球状模型，变程分别为92、67 km和79 km；②3类指标空间分布均呈西部低值、中部过渡、中东部和东部高值的格局，灌溉水利用效率、渠系水利用效率和田间水利用效率取值范围分别为27.0%~60.2%、29.1%~73.0%和40.5%~80.4%，平均值分别为44.42%、51.05%和58.28%；③GWR模型结果显示，节水灌溉面积比和灌区工程完好率对灌溉水利用效率均为正向影响，平均回归系数分别为0.925和0.841，是灌溉水利用效率提升的主要驱动因素；降水量和蒸发量平均回归系数分别为0.075和-0.204，影响强度较弱，且不同区域作用方向存在差异。【结论】达拉特旗2024年灌溉用水效率整体呈“西低东高”的空间格局，空间差异主要受节水灌溉面积比和灌区工程完好率等工程管理因素影响，气象因素作用相对较弱。中西部灌域应加强渠系工程维护和配套改造，东部灌域应继续提高节水灌溉措施的应用，如推广滴灌、喷灌等高效节水灌溉技术；优化灌溉制度，根据作物需水规律精准确定灌水定额和灌水时间等。 |
| 关键词: 达拉特旗；灌溉用水效率；空间格局；影响因素 |
| DOI：10.13522/j.cnki.ggps.2026141 |
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| Spatial pattern and influencing factors of the irrigation water use efficiency indicator system in Dalate Banner |
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Tong Changfu, Wei Chenyang, Ding Shaoyu, Zhou Hui, Cui Baoguang, Hou Xia
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1. Institute of Water Resources for Pastoral Areas, Ministry of Water Resources, Hohhot 010020, China;
2. College of Hydraulic and Civil Engineering. Inner Mongolia Agricultural University. Hohhot 010018, China;
3. Water Resources Bureau of Etoke Qi, Ordos 016199, China; 4. Enterprise Development Service Center, Etoke High-tech Industrial Development Zone, Ordos 016064, China; 5. Hulunbuir Water Resources Development Center, Hulunbuir 021100, China;
6. Zhungezhuer Qi Water Resources Development Center, Ordos 017100, China
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| Abstract: |
| 【Objective】The spatial pattern and main influencing factors of the irrigation water use efficiency indicator system in Dalate Banner were analyzed.【Method】This research focused on 42 sample irrigation districts in Dalate Banner. Irrigation water use efficiency, canal water use efficiency and field water use efficiency were selected to to investigate the spatial differentiation characteristics of the irrigation water use efficiency indicator system and its influencing factors with the methods of spatial autocorrelation analysis, semi-variogram fitting, kriging interpolation, and GWR models.【Result】①Irrigation water use efficiency showed a predominantly positive correlation within approximately 26 km, turning negative beyond 29 km. canal system water use efficiency remained positively correlated up to about 57 km, shifting to negative around 64 km; field water use efficiency exhibited the longest range of positive correlation, extending to approximately 70.51 km. The optimal semivariogram models for irrigation water use efficiency, canal system water use efficiency, and field water use efficiency were all spherical models, with ranges of 92 km, 67 km and 79 km, respectively. ②The spatial distribution of all three indicators showed a pattern of low values in the west, transitional values in the central region, and high values in the central-eastern and eastern regions. The ranges for irrigation water use efficiency, canal system water use efficiency, and field water use efficiency were 27.0%-60.2%, 29.1%-73.0% and 40.5%-80.4%, respectively, with average values of 44.42%, 51.05% and 58.28%.③The GWR model results indicated that the proportion of water-saving irrigation area and the engineering integrity rate of the irrigation district had positive effects on irrigation water use efficiency, with average regression coefficients of 0.925 and 0.841, respectively, which were the main driving factors for the improvement of irrigation water use efficiency. The average regression coefficients for precipitation and evaporation are 0.075 and -0.204 respectively. The influence is relatively weak, and the direction of their effects varies across different regions.【Conclusion】In 2024, the overall irrigation water use efficiency in Dalate Banner exhibited a spatial pattern of ‘low in the west and high in the east’. The spatial differences were mainly influenced by engineering management factors, such as the ratio of water?saving irrigation area and the engineering integrity rate of the irrigation district. The role of meteorological factors is relatively weak. The central and western irrigation areas should strengthen the maintenance and upgrading of canal systems, while the eastern irrigation areas should continue to enhance the application of water-saving irrigation measures, such as promoting efficient water-saving irrigation technologies like drip irrigation and sprinkler irrigation; optimize the irrigation system by accurately determining the irrigation quota and timing based on the water requirements of crops. |
| Key words: Dalate Banner; irrigation water use efficiency; spatial pattern; influencing factors |
