The dry forests are the type most widely distributed vegetation in tropics, and studies aimed at quantifying carbon stock these important for it to be quantified their participation as mitigating effects of climate change. With that mind, aim this research was quantify stocks woody, herbaceous, litter root components a patch tropical forest, with 30 years regeneration Iguatu-CE, Brazil. Initially inventoried by means floristic phytosociological survey woody component 1 ha area which had been...

Water scarcity in dry tropical regions is expected to intensify due climate change. Characterization of rainfall events needed for a better assessment the associated hydrological processes, and proposition adaptation strategies. There still no consensus on most appropriate method separate from continuous database, although minimum inter-event time (MIET) commonly used criterion. Semi-arid low latitudes hold distinct pattern compared their equivalent at higher latitudes; these seasonally...

The energy distribution of natural rainfall droplets at different stages canopy development in low-latitude semi-arid environments is still understudied. We assessed relationships between development, gross (P) and throughfall (TF) characteristics a tropical dry forest (TDF) with total 95 events rain during December 2019–July 2021, Northeast Brazil. One disdrometer was installed an open field to record the another under deciduous vegetation throughfall. At onset rainy season low leaf...

ABSTRACT Pak choi is a leafy vegetable rich in important bioactives for human health. As this cultivated predominantly Europe and Asia, there little information about it the Brazilian literature. The aim of study was to evaluate production quality pak hydroponic systems using nutrient solutions different electrical conductivities. An experiment set up following randomized block design, 2 × 5 factorial scheme, with two (NFT Semi-hydroponic) five levels conductivity (1.0, 2.0, 3.0, 4.0 5.0 dS...

ABSTRACT The objective of this work was to evaluated the precipitation characteristics (depth, I30 and erosivity) their effects on sediment production in three watersheds under different managements land use 35-year regenerating Caatinga (RC), thinned (TC), which underwent thinning trees with diameter smaller than 10 cm; deforested (followed by burning pasture) (DC). experimente conducted central, tropical semiarid region State Ceará, Brazil. events, surface runoff were monitored from 2010...

ABSTRACT The objective of this work was to assess the effect vegetation on runoff coefficients a Caatinga dry tropical forest before and after thinning. Thus, an experiment conducted with evaluations in three hydrological years (2008, 2011 2013) Iguatu, State Ceará, Brazil. In 2008, consisted 30-year regenerating forest. subjected thinning 2009, 2013, removing trees less than 10-cm diameter at breast height. Hydrological responses were evaluated as function daily precipitation water depths,...

Increased droughts and variable rainfall patterns may alter the capacity to provide ecosystem services, such as biomass production clean water provision. The impact of these factors in a semi-arid region, especially on dry tropical forest with Vertisols under different land uses regenerated vegetation thinned vegetation, is still unclear. This study analyzes hydrologic processes precipitation pulses intra-seasonal droughts, suggests management practices for services improvement. A local...

Soil’s physical and hydrological properties influence the proper modeling, planning, management of water resources soil conservation. In areas vertic soils subjected to wetting drying cycles, soil–water–atmosphere interaction is complex understudied at field scale, especially in dry tropical regions. This work quantifies analyzes crack development under conditions an expansive a semiarid region for both rainy seasons. Six 1 m2 plots experimental 2.8 ha watershed were photographed direct...

Non-rainfall water input to surface soil moisture is essential ecosystems, especially in dry climates, where a deficit may persist for several months. Quantifying the impact of gains by at night will help understand vegetation dynamics regions. The objective this study was evaluate non-rainfall contribution content and how it minimizes stress on plants with predominantly roots. experiment conducted low-latitude, semiarid environment tropical forest regenerating 42 years. temperature were...

ABSTRACT The adoption of measures to prevent and control erosive processes requires information about the factors affecting erosion sediment transport conditions. However, yield a basin depends on availability eroded material capacity. Thus, objective this study was identify that affect capacity at different spatial scales in an area with caatinga vegetation. carried out Iguatu Experimental Basin, state Ceará, Brazil, from 2009 2014, by monitoring two scale levels: watershed 2.06 ha, plot 20...

La erosión es la principal forma de degradación en el mundo, consecuencia pérdida suelo, agua y nutrientes, provocando daños directos e indirectos. El objetivo este trabajo cuantificar las pérdidas N, P K por hídrica condiciones lluvia simulada mediante aplicación seis pruebas cultivo continuo especies ciclo estacional, incluyendo cultivos aislados intercalados. estudio se llevó a cabo campo Estación Experimental Agronomía Eldorado do Sul (RS), Brasil, un Argisol Rojo Distrófico típico. Para...

ABSTRACT Knowing determinant factors of erosive process is essential to adopt soil conservationist and loss-mitigation measures. Therefore, the objective this work was assess correlation between rainfall characteristics sediment transport in Semiarid region Brazil. The study conducted at Iguatu Experimental Basin state Ceará, Brazil, a watershed with area 1.15 ha. vegetation thinned by removal plants diameters below 10 cm, remained an arboreous cover 60%. following variables were evaluated...

Objetivou-se com este trabalho delimitar e caracterizar morfometricamente uma bacia hidrográfica por meio de software livre QGIS. Realizou-se a delimitação caracterização física, bem como o uso ocupação do terreno da Rio Cobra no Estado Grande Norte, Brasil. Para realização física determinação rede drenagem utilizou-se complemento Terrain Analysis Using Digital Elevation Models – TauDEM, para aplicou-se técnica classificação semiautomática imagem satélite Sentinel 2, extensão Semi-Automatic...

ABSTRACT Information on hydrology, and vegetation distribution is essential for the development of techniques strategies to cope with droughts in semi-arid environments. The objective this study was evaluate partitioning gross rainfall into throughfall, stemflow, interception loss Brazilian Northeastern Atlantic Forest, its correlations characteristics. conducted Bica watershed, Portalegre, state Rio Grande do Norte, Brazil. work carried out 2017, monitoring an area 10 × 20 m. Total depths...

The nonlinear dynamics of the determining factors morphometric characteristics cracks in expansive soils make their typification a challenge, especially under field conditions. To overcome this difficulty, we used artificial neural networks to estimate crack Vertisol From July 2019 June 2020, soil (area, depth and volume), environmental (soil moisture, rainfall, potential evapotranspiration water balance) were monitored evaluated six experimental plots tropical semiarid region. Sixty-six...

CARACTERÍSTICAS DAS CHUVAS E INTERCEPTAÇÃO VEGETAL NO BIOMA CAATINGA JOSÉ BANDEIRA BRASIL1; HELBA ARAÚJO DE QUEIROZ PALÁCIO2; RIBEIRO NETO2; JACQUES CARVALHO FILHO3 EUNICE MAIA ANDRADE1 1 Departamento de Engenharia Agrícola, Universidade Federal do Ceará-UFC, Campus PICI, Bloco 804, Fortaleza-CE, Brasil. E-mail: josebbrasil@gmail.com; eandrade.ufc@gmail.com.2 Instituto Educação, Ciência e Tecnologia Ceará-IFCE, Iguatu, rodovia Iguatu-Várzea Alegre, Km 05, s/n, Iguatu-CE,...

In the Brazilian semiarid region, groundwater usually have high concentration of salts.In order to make these waters suitable for consumption, desalinators been installed in communities and rural settlements meet water demand.However, regardless efficiency membrane structure desalinators, reverse osmosis system will produce drinking also residue with salt higher than previous salinity.The sampling wells, purified water, saline reject was carried out four expeditions, between October 2013...

ABSTRACT The objective of this work was to evaluate the influence anthropic activities on effective precipitation (eP) and soil loss in watersheds under different land uses a tropical dry forest region. experimental area located central part State Ceará, Brazil. evaluated were: fallow Caatinga (FC), thinned (TC) deforested followed by burning procedure pasture cultivation (DBP). areas were monitored rainy season (January May, 2010), when 57 natural rainfalls occurred, totaling 941 mm...

A qualidade da água em reservatórios é uma preocupação crescente para sustentabilidade ambiental, os corpos hídricos desempenham um papel vital no fornecimento de potável, na agricultura e manutenção dos ecossistemas aquáticos. Nota-se que a questão hídrica vem se agravando ao longo do tempo, sendo região semiárida apresenta maiores impactos relação crise hídrica, porém hoje com disponibilidade notável todas as regiões mundo. pesquisa avaliou o impacto sazonalidade açude Taquara. Os dados...

The intensification of anthropogenic activities on soils contributes to soil loss through erosion. Moreover, the pattern in Cobra River watershed, located semiarid region Rio Grande do Norte, is related history land use and occupation, mainly from agriculture red ceramic industry, as well climatic seasonality region. Thus, objective this work was identify microbasin state Norte. For this, following analyses were performed: a survey class areas for years 1987, 1997, 2007 2017 part Mapbiomas...

Anthropogenic effects on the natural environment and soil moisture in tropical semi-arid region have not yetbeen determined. As such, temporal variability of was investigated two toposquences under different types ofplant cover: i) Caatinga regeneration since 1978 (CReg); ii) thinned by 40% (CThn). The research carried outin catchment located northeast Brazil, with an area 2.06 1.15 ha for CReg CThn respectively. Soil moisturewas determined using gravimetric method. Three random samples were...

A erosão hídrica tem apresentado elevado potencial de redução na capacidade produtiva dos solos além ocasionar problemas ambientais relacionados ao assoreamento e poluição recursos hídricos. Entre os diversos fatores ligados à erosão, a erosividade das chuvas é um mais importantes. O da chuva para gerar do solo conhecido como erosividade, sendo sua estimativa fundamental compreensão vulnerabilidade recurso uma determinada região. Nesse sentido, o trabalho objetiva especializar as informações...

An assertive understanding of cracks in expansive soils makes their typification a challenge, especially field conditions. Seeking to overcome such difficulty, digital images have been used estimate the fractal geometry surface with and without vegetation semi-arid environment. This study was carried out cross-section along main course first-order watershed Centro Sul region, Ceará State (Brazil). Two treatments comprised soil cover. Experimental plots were installed represent upper, middle,...

ABSTRACT Interception loss plays an important role in rainfall partitioning, retaining significant amounts of water that would be directed to the soil. In this work, objective was measure interception by vegetation and evaluate Rutter Gash models estimate different yerba mate production systems. The study conducted period from July/2019 March/2020 municipality Guarapuava, southern Brazil. total rainfall, stemflow, throughfall were monitored each event. applied. losses estimated considered...