Predicting coffee yield based on agroclimatic data and machine learning     

de Oliveira Aparecido  Lucas Eduardo  Lorençone  João Antonio  Lorençone  Pedro Antonio  Torsoni  Guilherme Botega  Lima  Rafael Fausto  dade Silva CabralMoraes  José Reinaldo 《Theoretical and Applied Climatology》2022,148(3-4):899-914

Theoretical and Applied Climatology - Climate directly and indirectly influences agriculture, being the main responsible for low and high yields. Prior knowledge on yield helps coffee farmers in...  相似文献   

Chemical effect of pesticide application on soils: evidence from rare earth elements     

Khadija Semhi  Joëlle Duplay  Gwenaël Imfeld  René Boutin 《Arabian Journal of Geosciences》2018,11(19):590

The main objective of this study is to investigate the distribution of rare earth elements (REEs) in Lolium perenne L. plant species which has been grown on vineyard soils treated with pesticide commonly used in the study area. These plants have been grown on two types of soils: (1) brown calcareous soils developed on loess and (2) brown to calcic brown soils developed on conglomerates. The significant correlation observed between the concentrations of phosphorus and the total amount of REEs, in addition to the enrichment in middle REEs (MREEs), suggests the complexation of REEs with phosphates and organic matter. The soils were enriched in REEs due to pesticide application but the plants were depleted. The ratio of REEs in plant over REEs in soil before application of pesticides is higher than that after application of pesticides. Application of pesticides to crops did not affect the fractionation of REEs neither in leaves nor in roots. No selectivity in uptake of REEs occurred because of pesticides except for Ce and Eu which show a negative anomaly relative to the other REEs.  相似文献   

Geostatistics for Environmental Applications     

Maria João Pereira  Amilcar Soares 《Mathematical Geosciences》2018,50(2):123-125

  相似文献   

Road distance and travel time for an improved house price Kriging predictor     

Henry Crosby  Theo Damoulas  Alex Caton  Paul Davis  João Porto de Albuquerque  Stephen A. Jarvis 《地球空间信息科学学报》2018,21(3):185-194

  相似文献   

HexASCII: A file format for cartographical hexagonal rasters          下载免费PDF全文

Luís Moreira de Sousa  João Paulo Leitão 《Transactions in GIS》2018,22(1):217-232

Hexagonal segmentations of space have long been known for their advantages vis à vis squared partitions in discretizing spatial variables, be it natural phenomena or human‐related features. However, readily available and easy‐to‐use tools to manipulate and interact with hexagonal rasters remain widely unavailable today. This article presents a first step to enable the use of hexagonal rasters in the GIS field. A format to encode cartographical hexagonal meshes as simple ASCII files is specified through a context‐free grammar. Named HexASCII, this file format provides a simple means of storing and sharing such rasters. A set of simple tools based on the HexASCII format is presented, allowing their creation and basic interaction with traditional GIS software.  相似文献   

Geostatistical Seismic Inversion with Self-Updating of Local Probability Distributions     

Azevedo  Leonardo  Narciso  João  Nunes  Rúben  Soares  Amílcar 《Mathematical Geosciences》2021,53(5):1073-1093

Mathematical Geosciences - Three-dimensional subsurface elastic models inverted from seismic reflection data are the basis of the geo-modeling workflow. These models are often used to predict the...  相似文献   

Investigation of potential debris flows above the Koroška Bela settlement,NW Slovenia,from hydro-technical and conceptual design perspectives     

Bezak  Nejc  Sodnik  Jošt  Maček  Matej  Jurček  Timotej  Jež  Jernej  Peternel  Tina  Mikoš  Matjaž 《Landslides》2021,18(12):3891-3906

Debris flows are one of the natural disasters that can occur in the alpine environment, cause large economic damage, and endanger human lives. This study presents an overview of recent research done in relation to the debris flow hazard assessment and conceptual mitigation at the Koro?ka Bela area in Slovenia. This includes fieldwork, lab experiments, modelling, and a conceptual design of hydro-technical measures to reduce the risk. The results indicate that multiple debris flows occurred in the past in the area but a relatively long period of more than 100 years without an extreme event led to urbanization and development of the area. Magnitudes of the most extreme events as the worst-case scenarios were estimated to be in the range between 100,000 and 400,000 m³, using debris flow modelling and geological information from research trenches. Based on the landslide volumes, such events could also potentially occur in the future in extreme conditions. Additionally, torrential floods could mobilize more than 15,000 m³ of material located along the stream network that can be regarded as potentially unstable. The existing check dam system does not have the capacity to capture this material. Thus, a new check dam and three flexible net barriers could help to reduce the risk due to torrential outbursts or debris flows.

  相似文献   

Style Transfer applied to CT image downscaling: a study case from Brazilian Coquinas     

Souza  João Paulo da Ponte  Avansi  Michelle Chaves Kuroda  Belila  Aline Maria Poças  Vidal  Alexandre Campane 《Computational Geosciences》2021,25(5):1457-1471

Computational Geosciences - The identification of micropore systems in carbonate rocks is an important task of image processing because of the high impact these systems cause on fluid flow....  相似文献   

Transpiration in Quercus suber trees under shallow water table conditions: the role of soil and groundwater          下载免费PDF全文

Clara A. Pinto  Nadezhda Nadezhdina  Jorge S. David  Cathy Kurz‐Besson  Maria C. Caldeira  Manuel O. Henriques  Fernando G. Monteiro  João S. Pereira  Teresa S. David 《水文研究》2014,28(25):6067-6079

Water is one of the major environmental factors limiting plant growth and survival in the Mediterranean region. Quercus suber L. woodlands occupy vast areas in the Iberian Peninsula, frequently under shallow water table conditions. The relative magnitude of soil and groundwater uptake to supply transpiration is not easy to evaluate under these circumstances. We recently developed a conceptual framework for the functioning of the root system in Q. suber that simulates well tree transpiration, based on two types of root behaviour: shallow connected and deep connected. Although this significantly improved knowledge on the functional traits of Mediterranean Q. suber, the approach has the limitation of requiring root sap flow data, which are seldom available. In this work, we present alternative methodologies to assess if trees are connected to groundwater and to estimate the soil and groundwater contributions to tree transpiration. We provide evidence on the tree unrestricted access to groundwater solely based on meteorological, stem sap flow and leaf water potential data. Using a soil mass balance approach, we estimated the yearly soil and groundwater contributions to tree transpiration: 69.7% and 30.3%, respectively. Groundwater uptake became dominant in the dry summer: 73.2% of tree transpiration. Results reproduce extremely well those derived from root modelling. Because of its simplicity both in formulation and data requirements, our approach is potentially liable to be adapted to other groundwater‐dependent Mediterranean oak sites, where interactions between land use and water resources may be relevant. Copyright © 2013 John Wiley & Sons, Ltd.  相似文献   

Intra‐messinian gypsum palaeokarst in the Northern Apennines and its palaeogeographic implications     

Jo De Waele  Giancarlo Pasini 《地学学报》2013,25(3):199-205

A short intra‐Messinian continental period has been recognised in some North Italian gypsum areas, mostly under the form of palaeokarst deposits. This emersion appears to have occurred only locally, and is explained as caused by the intra‐Messinian tectonic phase and a major sea level lowering. Evidences of this palaeokarst are mostly small, although at some places the palaeontological content of its fillings is of great importance. The discovery near Zola Predosa (Bologna) of a new intra‐Messinian extensive karst system and of its infilling sheds new light on the importance of this karst episode.  相似文献