Article(id=1297211690429468762, tenantId=1146029695717560320, journalId=1296125453100220459, issueId=1297211624738284246, articleNumber=null, orderNo=null, doi=10.11975/j.issn.1002-6819.202507115, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1752422400000, receivedDateStr=2025-07-14, revisedDate=1773763200000, revisedDateStr=2026-03-18, acceptedDate=null, acceptedDateStr=null, onlineDate=1787208968025, onlineDateStr=2026-08-20, pubDate=1782748800000, pubDateStr=2026-06-30, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1787208968025, onlineIssueDateStr=2026-08-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1787208968025, creator=13701087609, updateTime=1787208968025, updator=13701087609, issue=Issue{id=1297211624738284246, tenantId=1146029695717560320, journalId=1296125453100220459, year='2026', volume='42', issue='12', pageStart='1', pageEnd='396', issueExtLink='null', onlineDate='null', pubDate='1782748800000', pubDateStr='2026-06-30', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1787208952364, creator='13701087609', updateTime=1787212261177, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1297225503002357852, tenantId=1146029695717560320, journalId=1296125453100220459, issueId=1297211624738284246, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1297225503002357853, tenantId=1146029695717560320, journalId=1296125453100220459, issueId=1297211624738284246, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=155, endPage=166, ext={EN=ArticleExt(id=1297211692241408091, articleId=1297211690429468762, tenantId=1146029695717560320, journalId=1296125453100220459, language=EN, title=Analysis of the spatiotemporal characteristics of water and cultivated land resources balance in Northern China, columnId=1297211650193515394, journalTitle=Transactions of the Chinese Society of Agricultural Engineering, columnName=Soil and Water Engineering, runingTitle=null, highlight=null, articleAbstract=
Cropland water–land balance relationship can be regulated to maintain the cropland productivity, ecological stability, and sustainable land use. It is often required to optimize cropland spatial layout and crop planting structure in sustainable water and land resources, according to “Determining Land Use by Water Availability”. In this study, an integrated analytical framework was developed to explore the spatiotemporal characteristics of the balance between water and cultivated land resources. There was also a close relationship between crop water requirement, water deficit and surplus, drought events, and productivity loss. The research area was taken as the five major agricultural regions in northern China. Meteorological, crop planting structure, and gross primary productivity (GPP) were monthly collected from 2001 to 2022. The full-growing-season crop water requirements of winter wheat, spring maize, and summer maize were estimated using the FAO-56 crop coefficient. A decadal Crop Water Deficit and Surplus Index (CWDI) and its standardized form, the Standardized Crop Water Deficit and Surplus Index (SCWDI), were then constructed to integrate run theory. Empirical orthogonal function (EOF) analysis, correlation analysis, and a Copula–Bayesian conditional probability model were used to systematically identify the Spatiotemporal evolution of cropland water–land balance relationships, crop critical water-demand periods, and productivity loss risks under drought stress. The results showed that (1) multi-year mean full-growing-season water requirements of winter wheat and maize were 500 and 594 mm, respectively, particularly with 627 and 536 mm for spring and summer maize, respectively. Crop water requirements shared significant regional differences. In winter wheat, the water requirement followed the descending order of Huang–Huai–Hai Plain (521 mm) > Loess Plateau (514 mm) > Gansu–Xinjiang Region (467 mm), while spring maize shared the highest water requirement in the Gansu–Xinjiang Region (662 mm). (2) Average drought-event frequency ranged from 0.4 to 2.0 events per year. The Gansu–Xinjiang Region was characterized by a high proportion of extreme drought events, long duration, and high intensity, indicating a cumulative drought pattern, whereas the Huang–Huai–Hai Plain was dominated by high-frequency but short-duration drought events. (3) EOF decomposition showed that the first five modes cumulatively explained 73.7% of the total variance, with EOF1 and EOF2 accounting for 28.6% and 20.0%, respectively, indicating region-wide consistency and regional heterogeneity in interannual dry–wet variations of cropland. (4) Correlation analysis between SCWDI and standardized GPP (SGPP) showed that the key months were identified as July for spring and summer maize, while May for winter wheat. According to the cumulative effect, the water-demand stages of spring maize, summer maize, and winter wheat corresponded to May–June, June, and March–April, respectively. (5) SCWDI–SGPP dependence structures of spring maize and summer maize were best fitted by the Gaussian Copula, while the Frank Copula performed best for winter wheat. The average probabilities of productivity loss were 63%, 80%, and 44%, respectively, for spring maize, summer maize, and winter wheat under extreme drought conditions. The north-central Huang–Huai–Hai Plain and the Loess Plateau were identified as the drought stress conversion into productivity loss. The finding can provide a scientific basis for the optimal cropland layout and crop structure during drought risk prevention in northern China.
, authors=Chun DONG
1, 2, Yuhan ZHAO
1, 2, Yan YANG
2, *, Chaoying HE
3, Rong ZHAO
2, Wei ZHAO
3, Fengguang KANG
2, Xiaochen KANG
2, Xinglong QIAN
2, authorsList=Chun DONG, Yuhan ZHAO, Yan YANG, Chaoying HE, Rong ZHAO, Wei ZHAO, Fengguang KANG, Xiaochen KANG, Xinglong QIAN, authorCompany=null, correspAuthors=Yan YANG, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright © 2026 Transactions of the Chinese Society of Agricultural Engineering., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1297211694334365806, articleId=1297211690429468762, tenantId=1146029695717560320, journalId=1296125453100220459, language=CN, title=中国北方耕地水土平衡关系时空特征分析, columnId=1297211651858654084, journalTitle=农业工程学报, columnName=农业水土工程, runingTitle=null, highlight=null, articleAbstract=
耕地水土平衡关系是维持耕地生产力、生态稳定性与可持续利用能力的基础支撑和核心调控机制,研究耕地水土平衡关系对于支撑“以水定地”,促进耕地空间布局优化、作物种植结构优化和水土资源可持续利用具有重要现实意义。该研究以中国北方五大农业区为研究区,基于2001—2022年逐月栅格气象数据、作物种植结构与总初级生产力(gross primary productivity,GPP)数据,采用FAO-56作物系数法估算冬小麦、春玉米和夏玉米全生育期作物需水量,构建旬尺度作物水分盈亏指数(crop water deficit index,CWDI)及其标准化指数(standardized crop water deficit index,SCWDI),并结合游程理论、经验正交函数(empirical orthogonal function,EOF)、相关分析和Copula–Bayesian条件概率模型,系统识别北方耕地水土平衡关系的时空演变、作物需水临界期及干旱胁迫下的生产力损失风险。结果表明:1)研究区冬小麦与玉米全生育期多年均值需水分别为500 mm与594 mm,其中春玉米为627 mm、夏玉米为536 mm;需水量呈显著区域差异,冬小麦:黄淮海区521 mm>黄土高原区514 mm>甘新区467 mm,而春玉米在甘新区最高(662 mm)。2)研究区平均干旱事件频率为0.4~2.0次/a,甘新区表现出特旱占比较高、历时较长、强度较大的累积型干旱特征,黄淮海区则以高频、短历时干旱为主。3)EOF分解显示前5个模态累计解释73.7%的方差,EOF1和EOF2贡献率分别为28.6%和20.0%,表明北方耕地干湿变化在年际尺度上同时具有全区一致性和区域差异性特征。4)SCWDI与SGPP相关分析表明,春玉米和夏玉米识别的关键月份为7月、冬小麦为5月,考虑累积效应后,春玉米、夏玉米和冬小麦的关键需水阶段分别对应5—6月、6月和3—4月。5)春玉米与夏玉米的SCWDI—SGPP以Gaussian Copula拟合效果最佳,冬小麦以Frank Copula最优;特旱条件下春玉米、夏玉米和冬小麦的平均生产力损失概率分别约为63%、80%和44%,黄淮海区北中部及黄土高原区是干旱胁迫向生产力损失转化较为敏感的重点区域。该研究构建了作物需水—水分盈亏—干旱事件—生产力损失风险的耦合分析框架,可为北方地区耕地布局优化、作物结构调整和农业干旱风险防控提供依据。
, authors=董春
1, 2, 赵昱涵
1, 2, 杨妍
2, *, 何超英
3, 赵荣
2, 赵伟
3, 康风光
2, 亢晓琛
2, 钱兴隆
2, authorsList=董春, 赵昱涵, 杨妍, 何超英, 赵荣, 赵伟, 康风光, 亢晓琛, 钱兴隆, authorCompany=null, correspAuthors=杨妍, authorNote=
, correspAuthorsNote=
, copyrightStatement=版权所有 © 2026 农业工程学报编辑部, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=4iGjAUQOjtfRkdyTIiTW8g==, magXml=s1VJMXvk8hZcFadIbdrGVQ==, pdfUrl=null, pdf=4uAvivbiwu5+UDsgvEo4Lg==, pdfFileSize=5119159, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=AYqFIJ4o213kqkUgxjfXCg==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=A1eOw/wh1rAbG5cEtGTpXg==, mapNumber=null, fund=null)}, authors=[Author(id=1300032374838944023, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=dongchun@casm.ac.cn, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1300032374960578842, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, authorId=1300032374838944023, language=EN, stringName=Chun DONG, firstName=Chun, middleName=null, lastName=DONG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=
1School of Mapping and Geographical Science, Liaoning Technical University, Fuxin 123000, China
2Chinese Academy of Surveying and Mapping, Beijing 100036, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1300032375019299099, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, authorId=1300032374838944023, language=CN, stringName=董春, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=
1辽宁工程技术大学测绘与地理科学学院,阜新 123000
2中国测绘科学研究院,北京 100036, bio={"content":"
董春,博士,研究员,博士生导师,研究方向为人口空间化、国土空间分析与自然资源评价。Email:dongchun@casm.ac.cn
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董春,博士,研究员,博士生导师,研究方向为人口空间化、国土空间分析与自然资源评价。Email:dongchun@casm.ac.cn
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1辽宁工程技术大学测绘与地理科学学院,阜新 123000)]), AuthorCompany(id=1300032374671171856, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, xref=2, ext=[AuthorCompanyExt(id=1300032374679560465, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, companyId=1300032374671171856, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2中国测绘科学研究院,北京 100036)])]), Author(id=1300032375107379485, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, orderNo=1, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1300032375187071264, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, authorId=1300032375107379485, language=EN, stringName=Yuhan ZHAO, firstName=Yuhan, middleName=null, lastName=ZHAO, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=
1School of Mapping and Geographical Science, Liaoning Technical University, Fuxin 123000, China
2Chinese Academy of Surveying and Mapping, Beijing 100036, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1300032375254180129, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, authorId=1300032375107379485, language=CN, stringName=赵昱涵, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=
1辽宁工程技术大学测绘与地理科学学院,阜新 123000
2中国测绘科学研究院,北京 100036, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1300032374587285773, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, xref=1, ext=[AuthorCompanyExt(id=1300032374595674382, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, companyId=1300032374587285773, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1School of Mapping and Geographical Science, Liaoning Technical University, Fuxin 123000, China), AuthorCompanyExt(id=1300032374604062991, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, companyId=1300032374587285773, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1辽宁工程技术大学测绘与地理科学学院,阜新 123000)]), AuthorCompany(id=1300032374671171856, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, xref=2, ext=[AuthorCompanyExt(id=1300032374679560465, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, companyId=1300032374671171856, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2中国测绘科学研究院,北京 100036)])]), Author(id=1300032375346454819, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, orderNo=2, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=yangyan@casm.ac.cn, emailSecond=null, emailThird=null, correspondingAuthor=1, authorType=1, ext={EN=AuthorExt(id=1300032375430340901, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, authorId=1300032375346454819, language=EN, stringName=Yan YANG, firstName=Yan, middleName=null, lastName=YANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
2, *, address=
2Chinese Academy of Surveying and Mapping, Beijing 100036, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1300032375510032678, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, authorId=1300032375346454819, language=CN, stringName=杨妍, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
2, *, address=
2中国测绘科学研究院,北京 100036, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1300032374671171856, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, xref=2, ext=[AuthorCompanyExt(id=1300032374679560465, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, companyId=1300032374671171856, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2Chinese Academy of Surveying and Mapping, Beijing 100036, China), AuthorCompanyExt(id=1300032374683754770, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, companyId=1300032374671171856, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2中国测绘科学研究院,北京 100036)])]), Author(id=1300032375698776360, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, orderNo=3, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1300032375770079530, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, authorId=1300032375698776360, language=EN, stringName=Chaoying HE, firstName=Chaoying, middleName=null, lastName=HE, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
3, address=
3Department of Natural Resources Survey and Monitoring, Ministry of Natural Resources, Beijing 100812, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1300032375862354219, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, authorId=1300032375698776360, language=CN, stringName=何超英, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
3, address=
3自然资源部自然资源调查监测司,北京 100812, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1300032374750863635, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, xref=3, ext=[AuthorCompanyExt(id=1300032374759252244, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, companyId=1300032374750863635, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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3自然资源部自然资源调查监测司,北京 100812)])]), Author(id=1300032375933657389, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, orderNo=4, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1300032377561047343, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, authorId=1300032375933657389, language=EN, stringName=Rong ZHAO, firstName=Rong, middleName=null, lastName=ZHAO, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
2, address=
2Chinese Academy of Surveying and Mapping, Beijing 100036, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1300032377623961904, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, authorId=1300032375933657389, language=CN, stringName=赵荣, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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Impacts of different grades of drought on winter wheat yield in North China Plain[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2021, 37(14): 69-78. (in Chinese with English abstract), articleTitle=null, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1300032374587285773, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, xref=1, ext=[AuthorCompanyExt(id=1300032374595674382, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, companyId=1300032374587285773, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1辽宁工程技术大学测绘与地理科学学院,阜新 123000)]), AuthorCompany(id=1300032374671171856, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, xref=2, ext=[AuthorCompanyExt(id=1300032374679560465, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, companyId=1300032374671171856, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2Chinese Academy of Surveying and Mapping, Beijing 100036, China), AuthorCompanyExt(id=1300032374683754770, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, companyId=1300032374671171856, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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3Department of Natural Resources Survey and Monitoring, Ministry of Natural Resources, Beijing 100812, China), AuthorCompanyExt(id=1300032374767640853, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, companyId=1300032374750863635, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3自然资源部自然资源调查监测司,北京 100812)])], figs=[ArticleFig(id=1300032379771445587, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=EN, label=Fig.1, caption=
Geographic location of the study area, figureFileSmall=6Dp9R3oOYihfzNNXc+fA5A==, figureFileBig=HPhNcC7aS1JT9DqsLrHEZw==, tableContent=null), ArticleFig(id=1300032379859525972, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=CN, label=图1, caption=
研究区地理位置示意图注:该图基于自然资源部标准地图服务网站下载的审图号为 GS(2024)0650号的标准地图制作,底图无修改。
, figureFileSmall=6Dp9R3oOYihfzNNXc+fA5A==, figureFileBig=HPhNcC7aS1JT9DqsLrHEZw==, tableContent=null), ArticleFig(id=1300032379943412053, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=EN, label=Fig.2, caption=
The spatial distribution of multi-year average crop water requirement over 2001—2022, figureFileSmall=gROqVw/5X4/Kff6ZcA+L6Q==, figureFileBig=Vfe9NqsOAiBfnDcToWYczw==, tableContent=null), ArticleFig(id=1300032380023103830, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=CN, label=图2, caption=
2001—2022年多年平均作物需水量空间分布, figureFileSmall=gROqVw/5X4/Kff6ZcA+L6Q==, figureFileBig=Vfe9NqsOAiBfnDcToWYczw==, tableContent=null), ArticleFig(id=1300032380106989911, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=EN, label=Fig.3, caption=
Analysis of drought event characteristics, figureFileSmall=xEdFZRl9p01y3xWHJznClg==, figureFileBig=aGAAdpryDIgeP3e4WMXkFQ==, tableContent=null), ArticleFig(id=1300032380169904472, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=CN, label=图3, caption=
干旱事件特征分析, figureFileSmall=xEdFZRl9p01y3xWHJznClg==, figureFileBig=aGAAdpryDIgeP3e4WMXkFQ==, tableContent=null), ArticleFig(id=1300032380245401945, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=EN, label=Fig.4, caption=
Event frequencies per year, figureFileSmall=8OQNAhykLs8qFoo11wGvRA==, figureFileBig=PpFoVTvFmhu35/PsQTa7mw==, tableContent=null), ArticleFig(id=1300032380316705114, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=CN, label=图4, caption=
干旱事件频率注:A~E分别表示内蒙古及长城沿线区、东北区、黄土高原区、黄淮海区和甘新区。
, figureFileSmall=8OQNAhykLs8qFoo11wGvRA==, figureFileBig=PpFoVTvFmhu35/PsQTa7mw==, tableContent=null), ArticleFig(id=1300032380379619675, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=EN, label=Fig.5, caption=
EOF spatial modes and temporal coefficients in the study area, figureFileSmall=ZkLXuK7lFBg/Nwqz+RMQ+w==, figureFileBig=zJg6dA4xbaSnDtAmG5lAzA==, tableContent=null), ArticleFig(id=1300032382007009628, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=CN, label=图5, caption=
研究区EOF展开模态及时间系数, figureFileSmall=ZkLXuK7lFBg/Nwqz+RMQ+w==, figureFileBig=zJg6dA4xbaSnDtAmG5lAzA==, tableContent=null), ArticleFig(id=1300032382082507101, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=EN, label=Fig.6, caption=
Identification of crop critical water-requirement periods, figureFileSmall=vTm5rW5Xfhswv/MAggK/Aw==, figureFileBig=CmUElDKqIbfkYpTkcoXx1A==, tableContent=null), ArticleFig(id=1300032382149615966, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=CN, label=图6, caption=
研究区作物需水临界期, figureFileSmall=vTm5rW5Xfhswv/MAggK/Aw==, figureFileBig=CmUElDKqIbfkYpTkcoXx1A==, tableContent=null), ArticleFig(id=1300032382229307743, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=EN, label=Fig.7, caption=
Proportions of drought events across severity classes, figureFileSmall=2GPqg7IoHw/aiw9YUMgzXA==, figureFileBig=Syjj3F6mhmqTKeDw1aBk8g==, tableContent=null), ArticleFig(id=1300032382283833696, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=CN, label=图7, caption=
不同等级干旱事件占比, figureFileSmall=2GPqg7IoHw/aiw9YUMgzXA==, figureFileBig=Syjj3F6mhmqTKeDw1aBk8g==, tableContent=null), ArticleFig(id=1300032382359331169, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=EN, label=Fig.8, caption=
Probability of crop GPP loss under different drought conditions, figureFileSmall=ZXKIe6B4+eiYCgA9VhfJ9A==, figureFileBig=g14h27K/XSVRyh4UrNFXTw==, tableContent=null), ArticleFig(id=1300032382443217250, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=CN, label=图8, caption=
不同干旱条件下引发作物GPP损失的概率, figureFileSmall=ZXKIe6B4+eiYCgA9VhfJ9A==, figureFileBig=g14h27K/XSVRyh4UrNFXTw==, tableContent=null), ArticleFig(id=1300032382510326115, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=EN, label=Fig.9, caption=
SCWDI triggering thresholds for crop productivity loss during crop-specific critical water-demand periods, figureFileSmall=McLa6WPHDPFMh6ZmbtJSTw==, figureFileBig=e73c4/lPUZ5DBtK3kug5sg==, tableContent=null), ArticleFig(id=1300032382585823588, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=CN, label=图9, caption=
作物水临界期 SCWDI 触发阈值损失的概率, figureFileSmall=McLa6WPHDPFMh6ZmbtJSTw==, figureFileBig=e73c4/lPUZ5DBtK3kug5sg==, tableContent=null), ArticleFig(id=1300032382648738149, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=EN, label=Tab.1, caption=
The phenological information of maize and wheat of major agricultural regions in Northern China
, figureFileSmall=null, figureFileBig=null, tableContent=
品种 Variety
| 农业区 Agricultural regions | 生育前期 Early growth stage | 快速生长期 Rapid growth stage | 生育中期 Middle growth stage | 生育后期 Late growth stage | 全生育期长度(旬) Length of the whole growth period (ten-day) |
春玉米 Spring maize | 东北区 | 4月下旬—5月上旬 | 5月中旬—6月中旬 | 6月下旬—7月下旬 | 8月上旬—9月上旬 | 14 |
| 甘新区 | 4月下旬—5月中旬 | 5月下旬—6月中旬 | 6月下旬—7月中旬 | 7月下旬—9月下旬 | 16 |
| 内蒙古及长城沿线区 | 5月上旬—5月下旬 | 6月上旬—6月下旬 | 7月上旬—7月下旬 | 8月上旬—9月下旬 | 15 |
| 黄土高原区 | 4月下旬—5月中旬 | 5月下旬—6月中旬 | 6月下旬—7月中旬 | 7月下旬—9月下旬 | 16 |
夏玉米 Summer maize | 黄淮海平原区 | 6月上旬—6月中旬 | 6月下旬—7月上旬 | 7月中旬—8月上旬 | 8月中旬—9月上旬 | 10 |
| 黄土高原区 | 6月上旬—6月中旬 | 6月下旬—7月上旬 | 7月中旬—8月上旬 | 8月中旬—9月上旬 | 10 |
冬小麦 Winter wheat | 黄淮海平原区 | 10月上旬—10月下旬 | 11月上旬—翌年4月上旬 | 4月中旬—5月中旬 | 5月下旬—6月上旬 | 26 |
| 甘新区 | 9月中旬—10月上旬 | 10月中旬—翌年4月下旬 | 5月上旬—6月上旬 | 6月中旬—7月上旬 | 30 |
| 黄土高原区 | 9月下旬—10月中旬 | 10月下旬—翌年4月中旬 | 4月下旬—5月下旬 | 6月上旬—7月上旬 | 29 |
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中国北方各主要农业区作物物候信息表
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品种 Variety
| 农业区 Agricultural regions | 生育前期 Early growth stage | 快速生长期 Rapid growth stage | 生育中期 Middle growth stage | 生育后期 Late growth stage | 全生育期长度(旬) Length of the whole growth period (ten-day) |
春玉米 Spring maize | 东北区 | 4月下旬—5月上旬 | 5月中旬—6月中旬 | 6月下旬—7月下旬 | 8月上旬—9月上旬 | 14 |
| 甘新区 | 4月下旬—5月中旬 | 5月下旬—6月中旬 | 6月下旬—7月中旬 | 7月下旬—9月下旬 | 16 |
| 内蒙古及长城沿线区 | 5月上旬—5月下旬 | 6月上旬—6月下旬 | 7月上旬—7月下旬 | 8月上旬—9月下旬 | 15 |
| 黄土高原区 | 4月下旬—5月中旬 | 5月下旬—6月中旬 | 6月下旬—7月中旬 | 7月下旬—9月下旬 | 16 |
夏玉米 Summer maize | 黄淮海平原区 | 6月上旬—6月中旬 | 6月下旬—7月上旬 | 7月中旬—8月上旬 | 8月中旬—9月上旬 | 10 |
| 黄土高原区 | 6月上旬—6月中旬 | 6月下旬—7月上旬 | 7月中旬—8月上旬 | 8月中旬—9月上旬 | 10 |
冬小麦 Winter wheat | 黄淮海平原区 | 10月上旬—10月下旬 | 11月上旬—翌年4月上旬 | 4月中旬—5月中旬 | 5月下旬—6月上旬 | 26 |
| 甘新区 | 9月中旬—10月上旬 | 10月中旬—翌年4月下旬 | 5月上旬—6月上旬 | 6月中旬—7月上旬 | 30 |
| 黄土高原区 | 9月下旬—10月中旬 | 10月下旬—翌年4月中旬 | 4月下旬—5月下旬 | 6月上旬—7月上旬 | 29 |
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Grade of drought and waterlogging based on SCWDI
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旱涝分级 Drought and flood grading | SCWDI | | 旱涝分级 Drought and flood grading | SCWDI |
| 特旱Extreme drought | ≤-2.0 | | 轻涝Mild waterlogging | >0.5~1.0 |
| 重旱Severe drought | >-2~-1.5 | | 中涝Moderate waterlogging | >1.0~1.5 |
| 中旱Moderate drought | >-1.5~-1.0 | | 重涝Severe waterlogging | >1.5~2.0 |
| 轻旱Mild drought | >-1.0~-0.5 | | 特涝Extreme waterlogging | ≥2.0 |
| 无旱No drought | >-0.5~0.5 | | | |
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标准水分盈亏指数旱涝等级
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旱涝分级 Drought and flood grading | SCWDI | | 旱涝分级 Drought and flood grading | SCWDI |
| 特旱Extreme drought | ≤-2.0 | | 轻涝Mild waterlogging | >0.5~1.0 |
| 重旱Severe drought | >-2~-1.5 | | 中涝Moderate waterlogging | >1.0~1.5 |
| 中旱Moderate drought | >-1.5~-1.0 | | 重涝Severe waterlogging | >1.5~2.0 |
| 轻旱Mild drought | >-1.0~-0.5 | | 特涝Extreme waterlogging | ≥2.0 |
| 无旱No drought | >-0.5~0.5 | | | |
), ArticleFig(id=1300032382950728041, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=EN, label=Tab.3, caption=
Copula joint distribution function model fitting evaluation
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| 作物Crops | 联合分布 Joint distribution | AIC |
| 冬小麦Winter wheat | Frank | −0.247 |
| 春玉米Spring maize | Gaussian | −9.846 |
| 夏玉米Summer maize | Gaussian | −17.963 |
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Copula联合分布函数模型拟合评价
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| 作物Crops | 联合分布 Joint distribution | AIC |
| 冬小麦Winter wheat | Frank | −0.247 |
| 春玉米Spring maize | Gaussian | −9.846 |
| 夏玉米Summer maize | Gaussian | −17.963 |
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Mann–Kendall trend test
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区域 Region | 玉米Maize | | 冬小麦Winter wheat |
Sen’s slope (mm·a−1) | Z | | Sen’s slope (mm·a−1) | Z |
| 研究区 | 0.88 | 1.69 | | 0.25 | 0.74 |
| 东北区 | 0.15 | 0.37 | | | |
| 内蒙古及长城沿线区 | 0.41 | 0.53 | | | |
| 甘新区 | 1.84 | 3.01** | | 0.85 | 1.74 |
| 黄淮海区 | 1.71 | 2.27* | | −0.37 | −0.53 |
| 黄土高原区 | 1.20 | 1.70 | | 1.29 | 2.32* |
), ArticleFig(id=1300032383202386284, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=CN, label=表4, caption=
Mann-Kendall 趋势检验
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区域 Region | 玉米Maize | | 冬小麦Winter wheat |
Sen’s slope (mm·a−1) | Z | | Sen’s slope (mm·a−1) | Z |
| 研究区 | 0.88 | 1.69 | | 0.25 | 0.74 |
| 东北区 | 0.15 | 0.37 | | | |
| 内蒙古及长城沿线区 | 0.41 | 0.53 | | | |
| 甘新区 | 1.84 | 3.01** | | 0.85 | 1.74 |
| 黄淮海区 | 1.71 | 2.27* | | −0.37 | −0.53 |
| 黄土高原区 | 1.20 | 1.70 | | 1.29 | 2.32* |
), ArticleFig(id=1300032383298855277, tenantId=1146029695717560320, journalId=1296125453100220459, articleId=1297211690429468762, language=EN, label=Tab.5, caption=
EOF eigenvalues of annual SCWDI in the study area
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特征值序列 Eigenvalue sequence | 特征值 Eigenvalue | 贡献率 Contribution rate/% | 累计贡献率 Cumulative contribution rate/% |
| 1 | 4 013.4 | 28.6 | 28.6 |
| 2 | 2 745.8 | 20.0 | 48.6 |
| 3 | 1 579.5 | 11.2 | 59.8 |
| 4 | 1 127.3 | 8.0 | 67.8 |
| 5 | 827.8 | 5.9 | 73.7 |
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研究区年SCWDI的EOF特征值
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特征值序列 Eigenvalue sequence | 特征值 Eigenvalue | 贡献率 Contribution rate/% | 累计贡献率 Cumulative contribution rate/% |
| 1 | 4 013.4 | 28.6 | 28.6 |
| 2 | 2 745.8 | 20.0 | 48.6 |
| 3 | 1 579.5 | 11.2 | 59.8 |
| 4 | 1 127.3 | 8.0 | 67.8 |
| 5 | 827.8 | 5.9 | 73.7 |
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