Determination of the Growth Performance and Soil Protection Ability of the Caper (Capparis sp) in Eroded Site in Semi-Arid Region of Artvin, Turkey

The ecology of fish from intermittent streams in the Brazilian semi-arid region is still little known. In the past twenty years, the number of researchers dedicated to this topic has increased considerably. However, significant gaps still exist when compared to the perennial streams of other regions of Brazil. Questions that address seasonal variations come up against the determination of capture methods and techniques that are efficient in the different phases of the hydrological cycle. In addition, techniques widely used in perennial systems, such as electrofishing, in most cases, have not been effective. Aspects related to biology, physiology, behavior, functional and taxonomic ecology of fish still need to be investigated taking into account seasonal and spatial scale variations. In view of the growing transformation imposed on the Brazilian semi-arid region by the extensive use of natural resources and by climate change, aquatic environments and their biodiversity are threatened by the transformation of riparian vegetation, the sewage release, the species introduction, the modification of its course and artificial perennialization. Thus, we will present and discuss, in this paper, the studies developed on the ecology of fish in the intermittent streams of the Brazilian semi-arid region and the gaps and challenges to be faced by future research.

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Determination of crop evapotranspiration of table grapes in a semi-arid region of Northwest Mexico using multi-spectral vegetation index

Agricultural Water Management ◽

10.1016/j.agwat.2013.02.007 ◽

2013 ◽

Vol 122 ◽

pp. 12-19 ◽

Cited By ~ 25

Author(s):

S. Er-Raki ◽

J.C. Rodriguez ◽

J. Garatuza-Payan ◽

C.J. Watts ◽

A. Chehbouni

Keyword(s):

Arid Region ◽

Vegetation Index ◽

Crop Evapotranspiration ◽

Table Grapes ◽

Northwest Mexico ◽

Semi Arid Region ◽

Semi Arid

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Usefulness of class A Pan coefficient models for computation of reference evapotranspiration for a semi-arid region

MAUSAM ◽

10.54302/mausam.v65i4.1186 ◽

2021 ◽

Vol 65 (4) ◽

pp. 521-528

Author(s):

PK SINGH ◽

SK PATEL ◽

P JAYSWAL ◽

SS CHINCHORKAR

Keyword(s):

Arid Region ◽

Reference Evapotranspiration ◽

Accurate Determination ◽

Climatic Conditions ◽

Gujarat State ◽

Semi Arid Region ◽

Semi Arid ◽

Statistical Criteria ◽

Agricultural Organization

The reliability of estimates of reference evapotranspiration (ET0) using pan evaporation (Epan) depends on the accurate determination of pan coefficients (Kpan). Six ET0 models were evaluated for their usefulness using 33-year climatological dataset of a semi-arid region of the Gujarat state of India. The equations compared include Cuenca (1989), Allen and Pruitt (1991), Snyder (1992), Modified Snyder (Grismer et al., 2002), Orang (1998), and Pereira et al. (1995). The ET0 data, calculated using daily Kpan values from these equations, were compared to the Food and Agricultural Organization (FAO)-Penman-Monteith (FAO56-PM) method as a reference. Based on the visual comparison as well as from the statistical criteria, ET0 values computed using Modified Snyder and Orang model have very close agreement with the FAO56-PM method for daily, monthly, and annual estimates as compared to other approaches. The sequential performances of the explored models was found as: Modified Snyder (Eqn. 5) > Orang (Eqn. 6) > Cuenca Eqn. (2) > Allen & Pruitt (Eqn. 3) > Snyder (Eqn. 4) > Pereira et al. (Eqn. 7) model. Therefore, the Modified Snyder model (Grismer et al., 2002) could be recommended as the best model for ET0 computations under these prevailing climatic conditions for a semi arid region.

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A relação entre litogia e morfologia das encostas das montanhas Tucson, Arizona

Anuário do Instituto de Geociências - UFRJ ◽

10.11137/2008_1_30-42 ◽

2008 ◽

Vol 31 (1) ◽

pp. 30-42

Author(s):

Kamel Khanchoul ◽

Robert Altschul

Keyword(s):

Arid Region ◽

Structural Characteristics ◽

Size Analysis ◽

Slope Length ◽

Mountain Front ◽

Semi Arid Region ◽

The Relationship ◽

Semi Arid

The relationship between lithology and slope morphology is investigated at eight sites on granitic, andesitic, and sedimentary hillslopes in the Tucson Mountains, Arizona. Several methods are used in the study. Topographic profiles are constructed. Skewness indices, slope length, and mean slope angles of the different slope profiles are computed and compared with each other. Debris size analysis has permitted for some profiles, the determination of hillfront/piedmont junctions. The nature and structural characteristics of the bedrock are the ones that determine the hillslope morphology in this semi-arid region. There are, as a matter of fact, variations in profiles on the same bedrock nature but differently exposed. More precise morphologic studies have been also done in comparing the different lithologic pairs. They have permitted to show some similarities in shapes. The granitic-andesitic slopes and andesiic-sedimentary slopes are the best comparisons which show the relationship between lithology and slope morphology. The granitic-sedimentary slope relationship is shown in the hillfront concavities, mountain front and piedmont mean slope angles.

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