Effect of 4-2-1 strategy on achievement of eighth grade students in mathematics

Volume 1 , Issue 1 , March 2026 , Pages 128-143

Authors

Asst.L.Bafrin Gharib Ghafoor Karim 1

1 Department of Mathematical Sciences / College of Primary Education / Sulaimani University

DOI logo 10.17656/jzsb.12307

Keywords

Abstract

The aim of this study is to analyze the hypsometric characteristics of the Tle Valley watershed and determine the geomorphological stage of the erosion cycle that the watershed crossed, between the value of these characteristics and the hypsometric characteristics of the secondary watersheds Through numerical elevation model analysis (DEM 12.5M), and based on geographical information system (Arc GIS 10.8.2) in the study area. The importance of this study is to identify the geomorphological stages of development and drainage cycle of the Tle Valley River to take soil and water conservation measures for sustainable development of the area. The study concluded that the shape of the hypsometric curve (Hc) of the main basin of the Tle Valley indicates that the basin has reached an advanced geomorphological stage Stages of the removal cycle, most of the rock composition of the reservoir has been removed by 71% due to removal and weathering, and this part of the reservoir is close to the base level and 29% of the rock composition remains in the geomorphology course, which have hypsometric integrity values ​​ranging from (0.35) to (0.6). During this study, the researcher proposes to build dams and reservoirs on some valleys in order to store water and limit soil removal and land degradation, in addition to establishing small dams on the Tle Khoy River to prevent sediment accumulation, despite its hydrological importance.

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  • First online31 March 2026
  • Published at31 March 2026

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