GeoAPEXOL, a web GIS interface for the Agricultural Policy Environmental eXtender (APEX) model enabling both field and small watershed simulation

Abstract. This paper presents the development of MASDAN, an integrated platform consisting of a mobile application and a web-GIS interface for monitoring the Manila Bay environment. The MASDAN mobile application uses citizen science and Volunteered Geographic Information (VGI) to collect data on specific environmental issues. It also serves as an information, education, and communication (IEC) tool for its users. The MASDAN Monitoring Interface is a centralized citizen report assessment tool for local authorities and environmental agencies to validate and monitor environmental reports within their area of jurisdiction. These two components create a two-way flow of information between citizens and authorities, ensuring prompt and information-driven actions to environmental issues affecting the Manila Bay and linked environments.

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Invited Review Article: The Agricultural Policy/Environmental eXtender (APEX) Model: An Emerging Tool for Landscape and Watershed Environmental Analyses

Transactions of the ASABE ◽

10.13031/2013.30078 ◽

2010 ◽

Vol 53 (3) ◽

pp. 711-740 ◽

Cited By ~ 70

Author(s):

P. W. Gassman ◽

J. R. Williams ◽

X. Wang ◽

A. Saleh ◽

E. Osei ◽

...

Keyword(s):

Agricultural Policy ◽

Review Article ◽

Apex Model

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An Auto-Calibration Tool for the Agricultural Policy Environmental eXtender (APEX) Model

Transactions of the ASABE ◽

10.13031/trans.57.10601 ◽

2014 ◽

pp. 1087-1098 ◽

Cited By ~ 1

Keyword(s):

Agricultural Policy ◽

Apex Model ◽

Calibration Tool

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Development and evaluation of the bacterial fate and transport module for the Agricultural Policy/Environmental eXtender (APEX) model

The Science of The Total Environment ◽

10.1016/j.scitotenv.2017.09.231 ◽

2018 ◽

Vol 615 ◽

pp. 47-58 ◽

Cited By ~ 5

Author(s):

Eun-Mi Hong ◽

Yongeun Park ◽

Richard Muirhead ◽

Jaehak Jeong ◽

Yakov A. Pachepsky

Keyword(s):

Agricultural Policy ◽

Fate And Transport ◽

Apex Model

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WEB-BASED REPRESENTATION AND MANAGEMENT OF INFECTIOUS DISEASE DATA ON A CITY SCALE, CASE STUDY OF ST. PETERSBURG, RUSSIA

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ◽

10.5194/isprs-archives-xliv-3-w1-2020-87-2020 ◽

2020 ◽

Vol XLIV-3/W1-2020 ◽

pp. 87-91

Author(s):

I. Kuznetsov ◽

E. Panidi ◽

V. Korovka ◽

V. Galkin ◽

D. Voronov

Keyword(s):

Infectious Disease ◽

Medical Data ◽

Web Gis ◽

Web Interface ◽

Web Based ◽

Immunodeficiency Virus ◽

Hepatitis Infection ◽

Gis Interface ◽

The Web

Abstract. In 2019–2020, we conducted a set of case studies devoted to the investigation and design of a methodology for GIS-based support of medical administration and planning on a city scale when accounting and controlling infectious disease. The studies were conducted for the administrative territory of St. Petersburg city (Russia), and were based upon the medical statistics data collected and accounted by St. Petersburg medical administration. The statistics included data on tuberculosis, human immunodeficiency virus and hepatitis infection. All the medical data used in the study are impersonalized. GIS-based MDMS prototype was developed upon the QGIS software.Moving forward in the previously formed study direction, now we are working on MDMS interface redesigning to facilitate its usability. Current activities are focussed on incorporation of the Web interface into previously developed MDMS prototype. The paper discusses development of the Web GIS interface prototype, and poses feature research and development aims. First feedback collected from medicals makes it possible to pose a Web-GIS-based MDMS as more flexible and easy to use, in comparison to the desktop-GIS-based.

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Design and development of a web-based interface for the Agricultural Policy Environmental eXtender (APEX) model

Environmental Modelling & Software ◽

10.1016/j.envsoft.2018.09.011 ◽

2019 ◽

Vol 111 ◽

pp. 368-374 ◽

Cited By ~ 3

Author(s):

Qingyu Feng ◽

Bernard A. Engel ◽

Dennis C. Flanagan ◽

Chi-hua Huang ◽

Haw Yen ◽

...

Keyword(s):

Agricultural Policy ◽

Design And Development ◽

Web Based ◽

Apex Model

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Enhancement of Agricultural Policy/Environment eXtender Model (APEX) Model to Assess Effectiveness of Wetland Water Quality Functions

Water ◽

10.3390/w11030606 ◽

2019 ◽

Vol 11 (3) ◽

pp. 606 ◽

Cited By ~ 2

Author(s):

Amirreza Sharifi ◽

Sangchul Lee ◽

Gregory McCarty ◽

Megan Lang ◽

Jaehak Jeong ◽

...

Keyword(s):

Water Quality ◽

Agricultural Policy ◽

Current Model ◽

Model Performance ◽

Organic N ◽

P Cycling ◽

Wetland Water ◽

Wetland Water Quality ◽

Apex Model ◽

N And P Cycling

The Agricultural Policy/Environmental eXtender (APEX) model has been widely used to assess changes in agrochemical loadings in response to conservation and management led by US Department of Agriculture (USDA). However, the existing APEX model is limited in quantification of wetland water quality functions. This study improved the current model capacity to represent wetland water quality functions by addition of a new biogeochemical module into the APEX model. The performance of an enhanced APEX model was tested against five observed outgoing water quality variables (e.g., sediment, organic N, NO3, NH4 and PO4) from a wetland within the Eastern Shore of Maryland. Generalized Likelihood Uncertainty Estimation (GLUE) was implemented to assess model uncertainty. The enhanced APEX model demonstrated that it could effectively represent N and P cycling within the study wetland. Although improvement of model performance was limited, the additions of wetland biogeochemical routines to the APEX model improved our understanding of inner mass exchanges within N and P cycling for the study wetland. Overall, the updated APEX model can provide policymakers and managers with improved means for assessment of benefits delivered by wetland conservation.

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Improving Modeling of Quinoa Growth Under Saline Conditions Using the Enhanced Agricultural Policy Environmental eXtender Model

Agronomy ◽

10.3390/agronomy9100592 ◽

2019 ◽

Vol 9 (10) ◽

pp. 592 ◽

Cited By ~ 1

Author(s):

Goehring ◽

Verburg ◽

Saito ◽

Jeong ◽

Meki

Keyword(s):

Soil Salinity ◽

Agricultural Policy ◽

Root Zone ◽

Water System ◽

Salt Uptake ◽

Plant Soil ◽

Stress Functions ◽

Annual Biomass ◽

Increase Productivity ◽

Apex Model

Cultivation of highly salt-tolerant plants (i.e., halophytes), may provide a viable alternative to increase productivity compared to conventional salt-sensitive crops, increasing the economic potential of salt-affected lands that comprise ~20% of irrigated lands worldwide. In this study the Agricultural Policy/Environmental eXtender (APEX) model was adapted to simulate growth of the halophyte quinoa, along with salt dynamics in the plant-soil-water system. Model modifications included salt uptake and salt stress functions formulated using greenhouse data. Data from a field site were used to further parameterize and calibrate the model. Initial simulation results were promising, but differences between simulated and observed soil salinity and plant salt values during the growing season in the calibration suggest that additional improvements to salt uptake and soil salinity algorithms are needed. To demonstrate utility of the modified APEX model, six scenarios were run to estimate quinoa biomass production and soil salinity with different irrigation managements and salinities. Simulated annual biomass was sensitive to soil moisture, and root zone salinity increased in all scenarios. Further experiments are needed to improve understanding of crop salt uptake dynamics and stress sensitivities so that future model updates and simulations better represent salt dynamics in plants and soils in agricultural settings.

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