Assessment of the main factors affecting the dynamics of nutrients in two rainfed cereal watersheds

Hernández-García, I.; Merchán, Daniel; Aranguren, Itxaso; Casalí, Javier; Giménez, Rafael; Campo‐Bescós, Miguel Ángel; Lersundi, J. Del Valle de

doi:10.1016/j.scitotenv.2020.139177

Cited by 10 publications

(16 citation statements)

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“…and N attached to the sediment (Bingner et al, 2018). This study focuses on the dissolved part, using nitrate as dissolved N, which is the most mobile N compound in watersheds (Hernández-García et al, 2020), and the most mobile form of mineral N in the soil (Merrington et al, 2002).…”

Section: Annagnps Modelmentioning

confidence: 99%

“…Runoff data were primarily based on the curve number (CN) obtained from the Technical Release 55 (USDA-NRCS, 1986), and adapted to the particular conditions of each watershed as previously reported by (Government of Navarre, 2005a, 2005bChahor et al, 2014;Hernández-García et al, 2020).…”

Section: Annagnps Model Inputsmentioning

confidence: 99%

“…• Bare Soil, Winter CN and Spring CN in Soils with hydrologic group C in Laxaga There are several causes for the importance of these parameters to runoff. The wet season occurs between the months of November-March for both watershed, producing a considerable increase in runoff from the end of December/beginning of January to March/April, due to the increase of the humidity content of the soil (Hernández-García et al, 2020). The Winter CN parameter represents the curve number of the cereal in its first development stages, which happens in the January-March period, coinciding with the period of highest rainfall and runoff.…”

Section: Global Searchmentioning

confidence: 99%

“…In Navarre (northern Spain), the former Department of Agriculture, Livestock, and Food of the Government of Navarre implemented a network of experimental agricultural watersheds to evaluate and monitor soil erosion and water quality in different areas with a representative land use of the region. Several studies have been carried out in these watersheds, focusing on nutrient and salt dynamics Hernández-García et al, 2020) and soil erosion and sediment transportation (Casalí et al, 2008(Casalí et al, , 2010Giménez et al, 2012;.…”

Section: Introductionmentioning

confidence: 99%

“…For this reason, the former Department of Agriculture, Livestock, and Food of the Government of Navarre implemented a network of small agricultural watersheds, encompassing the main agricultural land uses and management practices in the region. Several studies related to water quality and nutrients have been conducted in these watersheds (Casalí et al, 2008(Casalí et al, , 2010Hernández-García et al, 2020). A recent study evaluated two watersheds with similar land use, management and climate conditions, and reported that riparian vegetation and tile drainage significantly influenced N exports (Hernández-García et al, 2020, see Chapter 5).…”

Section: Introductionmentioning

confidence: 99%

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Assessment and modeling of the generation and transport of water and solutes in representative watersheds of Navarre (Spain): toward an optimal and sustainable agrarian activity

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The overarching aim of this thesis is to expand the knowledge base on the dynamics of total dissolved solids, with special focus on the most widespread nutrients in agricultural systems (N, and to a lesser extent P). To this end, (1) the exports of dissolved solids and their dynamics in a watershed network have been quantified, considering different agrosystems of the region of Navarre (Spain). Recognizing the influence of these compounds on different water bodies, and with the aim of shedding more light on the black box watershed approach in water quality, (2) the relatively recent concept of overland flow connectivity has been assessed through an Overland Flow Connectivity index. This index is based on broadly adopted overland flow connectivity indices, and implemented at two rainfed winter cereal watersheds (Latxaga and La Tejería). Regarding nutrients, and focusing on nitrate and phosphate dynamics, (3) these two watersheds have been characterized in terms of concentration and exports of nitrate and phosphate, for a range of temporal scales, with insights on the controlling factors of these processes. Finally, (4) the nutrient controlling factors previously identified have been quantified considering different possible scenarios. The AnnAGNPS model capacity has been evaluated for dissolved nitrogen exports at the two rainfed winter cereal watersheds.

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Section: Annagnps Modelmentioning

confidence: 99%

Section: Annagnps Model Inputsmentioning

confidence: 99%

Section: Global Searchmentioning

confidence: 99%