论文抢“鲜”看|基于生物炭改良土与自动灌溉技术相结合的绿色基础设施中水分调控与保护初探

本文简介：

生物炭是一种碳汇材料，具有提高各种土壤持水能力的潜力。然而，在长期维护绿色基础设施的过程中，需要调控覆盖层中的含水量，以维持半干旱条件下的植被生长。本研究通过一系列的一维土柱试验，研究了改良后的生物炭土壤与地下滴灌相结合的处理方式对土壤持水特性的影响。为了确定适用于半干旱气候条件的最佳处理方法，在土样中分别添加了0%、1%、3%和5%含量的生物炭。使用配备了土壤湿度传感器的自动灌溉装置来控制地基土的含水量，以促进植被生长。每个土柱试验持续150小时，在此期间记录了土壤的体积含水量和吸力数据。试验结果表明，若不考虑时间成本，添加3%生物炭的改良土样在节水方面是最有效的。高生物炭含量的土壤（例如5%）会消耗更多的水分，因为其持水能力得到了增强。基于试验结果可以得出如下结论：适宜的添加比例在1%～3%范围内，这样做不仅可以减少灌溉或使用的水量，还可以降低时间成本。这种技术可应用于绿色基础设施中的水分调控，以及开发保护深地废料储存设施周围环境的屏障。

Brief Introduction：

Biochar is a carbon sink material with the potential to improve water retention in various soils. However, for the long-term maintenance of green infrastructure, there is an additional need to regulate the water contents in the covers to maintain vegetation growth in semiarid conditions. In this study, biochar-amended soil was combined with subsurface drip irrigation, and the water preservation characteristics of this treatment were investigated through a series of one-dimensional soil column tests. To ascertain the best treatment method specific to semiarid climatic conditions, the test soil was amended with 0%, 1%, 3%, and 5% biochar. Automatic irrigation devices equipped with soil moisture sensors were used to control the subsurface water content with the aim of enhancing vegetation growth. Each soil column test lasted 150 h, during which the volumetric water contents and soil suction data were recorded. The experimental results reveal that the soil specimen amended with 3% biochar is the most water-saving regardless of the time cost. Soil with a higher biochar content (e.g., 5%) consumes a more significant amount of water due to the enhancement of the water-holding capacity. Based on the experimental results, it can be concluded that the appropriate ratio can be determined within 1%~3%, which can reduce not only the amount of irrigated/used water but also the time cost. Such technology can be explored for water content regulation in green infrastructure and the development of barriers for protecting the environment around deep underground waste containment.

本文亮点： 

1. 提出结合碳汇材料如生物炭和自动灌溉的技术方案，以调控土壤含水量。

2. 开展一维土柱试验，以确定在田间持水量所需范围内调控含水量的最佳生物炭含量。

3. 当生物炭含量在1%到3%之间时，所需灌溉水量最小。这是因为生物炭增强了土壤的持水能力。
   

4. 过量的生物炭（5%含量）可能会导致土壤表面发展出真菌霉菌，并增加所需的灌溉水量。
   

Highlights：

1. Combination of a carbon sink material such as biochar and automated irrigation technology is proposed for regulating soil water content.

2. 1-D column tests were conducted to determine optimal biochar content required for regulating water content within the desired range of field capacity.

3. Water usage is minimal for biochar content between 1% to 3%. This is due to enhancement of soil water retention capacity by biochar.

4. Excess biochar (5% content) can also lead to development of fungi mold on surface of soil and higher water usage.

第一作者简介：

朱鸿鹄，南京大学地球科学与工程学院，教授、博导，大地探测与感知研究院院长，国家杰青基金获得者，主要从事地质工程、岩土力学等领域的教学与科研工作。近年来发表120余篇学术论文，其中SCI收录80篇，授权国家发明专利21项、软件著作权3项，先后获颁国家科技进步一等奖、工程建设科技进步一等奖、中国地质学会青年地质科技奖、谷德振青年科技奖等。近年来主持国家自然科学基金、国家重点研发计划等20余项国家级、省部级科研项目。

通讯作者简介：

Ankit Garg，汕头大学土木与环境工程系副教授，主要从事岩土工程可持续材料的开发利用和绿色基础设施相关研究。他在印度理工学院Guwahati分校获得理学学士学位，并在香港科技大学获得博士学位，曾任印度理工学院Guwahati分校助理教授（2015-2017年）、世界银行兼职顾问（2016-2017年），期间主持了印度阿萨姆邦的交通基础设施监测项目。因其学术成就，先后获得英国土木工程师协会的特尔福德特优奖、教育部广东省青年博士奖。现任《Acta Geophysica》和《 Journal of Intelligent and Fuzzy systems》等多个国际期刊的副主编，并主持国家自然科学基金青年基金等项目。

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Deep Underground Science and Egineering

《深地科学（英文）》（Deep Underground Science and Engineering）是由中华人民共和国教育部主管，中国矿业大学主办的深地科学领域的第一本国际期刊，成功入选 ”中国科技期刊卓越行动计划高起点新刊项目”。主编是中国工程院院士谢和平教授，执行主编是新加坡工程院院士Chunfai Leung教授。与国际知名出版商 Wiley 合作，进行全球OA出版发行。已被EI、Scopus、DOAJ、CNKI等数据库收录。

《深地科学（英文）》以创办高起点国际期刊，构建世界领先的专注于深地科学前沿研究的学术交流主流平台，建设成为世界一流科技期刊为目标，为打造“深地科学”联盟奠定基础，致力于引领“深地科学”研究，有望成为刊发该领域重要研究的战略前沿阵地。

《深地科学（英文）》欢迎广大学者积极投稿，共同努力将本刊建成世界一流的高水平期刊。出版费由期刊资助，您无需支付任何费用。

Deep Underground Science and Engineering (DUSE), as a new international and fully open access journal ,aims to build a mainstream academic exchange platform focusing on forefront research, and  to become a world-class scientific and technological journal.DUSE is currently indexed in prominent databases: EI, CNKI, DOAJ and the Scopus database et al. 

The DUSE publishes the papers on important theoretical breakthroughs, valuable reviews of state-of-the-art, or discussions on the latest innovative, prospective, and leading achievements in the field of Deep Underground Science and Engineering. Papers on core fundamental research, revolutionary technology development, major engineering construction, special environmental effects, and other important related studies are also solicited.

DUSE intends to present the latest findings to help keep researchers worldwide abreast of the latest developments in the field and it welcomes papers with an emphasis on innovation, leading achievements, core research, theoretical breakthroughs and valuable reviews focusing on, but not limited to, the following topics:

刊登范围：

地质资源勘探与开采

Exploration and extraction of geo-resources

能源物质地下储存和提取

Energy extraction and storage

地下空间基础设施

Underground infrastructures

地质环境和废弃物地质处置

Geo-environments and waste geological disposal

深地空间科学实验

Research and testing space in deep underground

地下空间或地下工程规划，设计和施工技术

Plan， design and construction technology for underground space and engineering

文章类型：Research Article、Review Article、Case Study、Perspective、Short Communication、Commentary、Correspondence、Editorial.