Statistical and Spatial Analysis of Land Cover Impact on Selected Metro Vancouver, British Columbia Watersheds

Shupe, Scott M.

doi:10.1007/s00267-012-9955-x

Cited by 11 publications

(3 citation statements)

References 11 publications

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“…it appears as signi cant variable in the second best model. The relationship between nitrate concentration and agriculture is well known (see, for instance,Monteagudo et al, 2012;Shupe, 2013), and it was also observed in a previous study in 23 of these streams(Amuchástegui et al 2016). …”

supporting

confidence: 67%

Acidification and increase of phosphorus levels in Pampean streams after 12 years of agricultural intensification

et al. 2023

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Agricultural intensi cation is a process that is still undergoing in many emergent economies. In the Pampas (central Argentina), the former low-external input farming was replaced by a model based on genetically modi ed crops and the intensive use of pesticides (mainly glyphosate) in the last decades.Here, we analyzed changes in water chemistry (pH, conductivity, dissolved oxygen, nutrients, and carbonates) in 41 streams of Buenos Aires province between 2003/04 and 2015/16, and the impact of geology, soil type and land use change on water chemistry. We also used the SPARROW model to further analyze possible drivers of stream phosphorus loads.We observed modi cations at reach scale in several streams, including changes in channel morphology, riparian vegetation and land use, and a moderate expansion of agriculture in most basins. Mean nitrate concentration did not signi cantly change between 2003/04 and 2015/16, and it was related to cropland cover in the basins. Dissolved phosphorus concentration increased in the streams, especially in the southern uvial regions, but contrary to our expectations, phosphorus levels were not associated to land use but to pH. The SPARROW model also supported the link between water acidi cation and phosphorus concentration, and indicated that the whole basin acts as a phosphorus source.Possible explanations of uvial acidi cation may be related to current agricultural practices, including higher inputs of labile carbon from croplands, soil acidi cation by nitrogenous fertilizers, and the generalized use of glyphosate. This highlights the necessity of adopting new agricultural paradigms to reduce the use of agrochemicals in Pampean basins.

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confidence: 67%

Acidification and increase of phosphorus levels in Pampean streams after 12 years of agricultural intensification

et al. 2023

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“…In a similar study, Schilling et al [9] using statistical analysis of annual discharge and precipitation in the Mississippi River, indicate that expanding soybean acreage in the basin is the main factor that caused the increasing discharge of the Upper Mississippi River Basin. Moreover, LULC change affects not only the quantity of water but also the quality of water [10,11]. …”

Section: Introductionmentioning

confidence: 99%

Analysis of Agricultural Land Use Change in the Middle Reach of the Heihe River Basin, Northwest China

Zhang

2014

IJERPH

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The Heihe River Basin (HRB) is the second largest inland river basin in arid Northwest China. The expanding agricultural irrigation, growing industrialization, and increasing urban development in the middle reach have depleted much of the river flow to the lower reach, degrading the corresponding ecosystems. Since the enactment of the State Council of China’s new HRB water allocation policy in 2000 tremendous land use and land cover (LULC) changes have taken place to reduce water consumption in the middle reach and deliver more water downstream. This paper analyzes LULC changes during the period of 2000–2009 to understand how the changing land use patterns have altered water resource dynamics in the region. Results, while yet to be further verified in the field, show that from 2000 to 2009, urban, agricultural land, rangeland, and forest areas have increased, and barren area has decreased. Within the cropland, rice (a high water consumption crop) planting area decreased, while corn and wheat (relatively lower water consumption crops) planting areas increased. These changes in land use patterns, especially in the agricultural zones, have ensured the discharge of the required amount of water to the lower reach.

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“…Specifically, a partition of different land cover types based on the analytic description of the region of Vancouver obtained by the research of [74] was made. The selected region encompasses all the geological features specific to the area, serving as a general criterion to ensure the robustness and effectiveness of the proposed feature extraction process across various datasets.…”

Section: Dipolementioning

confidence: 99%

A Review on PolSAR Decompositions for Feature Extraction

Karachristos,

Koukiou,

Anastassopoulos

2024

J. Imaging

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Feature extraction plays a pivotal role in processing remote sensing datasets, especially in the realm of fully polarimetric data. This review investigates a variety of polarimetric decomposition techniques aimed at extracting comprehensive information from polarimetric imagery. These techniques are categorized as coherent and non-coherent methods, depending on their assumptions about the distribution of information among polarimetric cells. The review explores well-established and innovative approaches in polarimetric decomposition within both categories. It begins with a thorough examination of the foundational Pauli decomposition, a key algorithm in this field. Within the coherent category, the Cameron target decomposition is extensively explored, shedding light on its underlying principles. Transitioning to the non-coherent domain, the review investigates the Freeman–Durden decomposition and its extension, the Yamaguchi’s approach. Additionally, the widely recognized eigenvector–eigenvalue decomposition introduced by Cloude and Pottier is scrutinized. Furthermore, each method undergoes experimental testing on the benchmark dataset of the broader Vancouver area, offering a robust analysis of their efficacy. The primary objective of this review is to systematically present well-established polarimetric decomposition algorithms, elucidating the underlying mathematical foundations of each. The aim is to facilitate a profound understanding of these approaches, coupled with insights into potential combinations for diverse applications.

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Statistical and Spatial Analysis of Land Cover Impact on Selected Metro Vancouver, British Columbia Watersheds

Cited by 11 publications

References 11 publications

Acidification and increase of phosphorus levels in Pampean streams after 12 years of agricultural intensification

Acidification and increase of phosphorus levels in Pampean streams after 12 years of agricultural intensification

Analysis of Agricultural Land Use Change in the Middle Reach of the Heihe River Basin, Northwest China

A Review on PolSAR Decompositions for Feature Extraction

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