| 引用本文: | 王敬浪,庞治国,江威,等.灌区衬砌工程防盐效果遥感评估方法研究[J].灌溉排水学报,0,():-. |
| WANG Jinglang,PANG Zhiguo,JIANG Wei,et al.灌区衬砌工程防盐效果遥感评估方法研究[J].灌溉排水学报,0,():-. |
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| 灌区衬砌工程防盐效果遥感评估方法研究 |
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王敬浪,庞治国,江威,等
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1.中国水利水电科学研究院;2.水利部防洪抗旱减灾工程技术研究中心;3.中国再保险（集团）股份有限公司博士后科研工作站;4.内蒙古河套灌区水利发展中心
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| 摘要: |
| 【目的】当前,河套灌区实施了一系列的渠道工程措施来保护渠道,防止渠道渗水,抑制土壤盐渍化,但缺少一种针对灌区衬砌工程防盐效果的评估方法。本文旨在探究利用卫星遥感技术开展河套灌区渠道衬砌工程防盐效果评估。【方法】收集多时相的Landsat8多光谱卫星遥感影像,采用ISODATA聚类方法自动提取河套灌区内的盐碱地,然后利用空间分析方法生成渠道两侧宽度为d缓冲区,统计缓冲区内盐碱地面积S,构建盐碱地密度指标φ,得到φ-d关系曲线。【结果】结果表明,渠道衬砌后的渠道两侧盐碱地面积显著下降,盐碱地面积分布曲线呈阶梯状特征。【结论】(1)渠道衬砌工程有效地抑制了盐碱地两侧的土壤盐碱化过程。2013-2016年间,衬砌后的渠道两侧500m范围内盐碱地面积下降最低49.63%,最高86.81%；1000m范围内盐碱地面积下降最低47.95%,最高95.06%；1500m范围内,盐碱地面积下降幅度最低54.56%,最高95.68%。(2)卫星遥感技术对大范围渠道工程防盐效果开展评估是可行的(3)衬砌前后,φ-d关系曲线发生改变,表明盐碱地的空间分布模式发生变化,由原来的均匀分布转变为现在的聚集性分布。 |
| 关键词: 灌区;渠道衬砌;遥感;盐碱地 |
| DOI： |
| 分类号:S127 |
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| Study on Remote Sensing Evaluation Method of Salinization Prevention Effect of Lining Engineering in Irrigated Area |
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WANG Jinglang1,2,3, PANG Zhiguo1,2,3, JIANG Wei1,2,3,4, LI Gendong5, ZHANG Xiaohong5
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1.China Institute of Water Resources and Hydropower Research;2.Research Center on Flood &3.Drought Disaster Reduction of the Ministry of Water Resources;4.3.Postdoctoral workstation of China Reinsurance (Group) Corporation;5.Inner Mongolia Hetao Irrigation District Water Conservancy Development Center
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| Abstract: |
| 【Objective】At present, hetao irrigation district has implemented a series of channel engineering measures to protect the channel, prevent water seepage and inhibit soil salinization, but there is a lack of an evaluation method for the salt prevention effect of the lining engineering in the irrigation district. This paper aims to explore the application of satellite remote sensing technology to evaluate the salt prevention effect of channel lining in Hetao irrigation area.【Method】Multi-temporal Landsat8 multi-spectral satellite remote sensing images were collected, and the saline-alkali land in hetao irrigation area was automatically extracted by ISODATA clustering method. Then, a buffer zone with d width on both sides of the channel was generated by spatial analysis method. The area S of saline-alkali land in the buffer was calculated, and the density index φ was constructed, and the φ-d relation curve was obtained.【Result】The results showed that the saline-alkali land area on both sides of the channel decreased significantly after the channel lining, and the saline-alkali land area distribution curve showed a step-like feature. 【Conclusion】(1) Channel lining can effectively inhibit the soil salinization process on both sides of saline-alkali land. From 2013 to 2016, the saline-alkali land area within 500m on both sides of the lined channel decreased by 49.63% and 86.81%, respectively. In the range of 1000m, the saline-alkali land area decreased by 47.95% and 95.06%, respectively. In the range of 1500m, the saline-alkali land area decreased by 54.56% and 95.68% respectively. (2) It is feasible to evaluate the salt prevention effect of large-scale channel engineering by satellite remote sensing technology. (3) before and after lining, φ-d relation curve changes, indicating that the spatial distribution pattern of saline-alkali land changes from the original uniform distribution to the present concentrated distribution. |
| Key words: Irrigation district; Channel lining; Remote sensing; Saline-alkali land |
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