Soil Erosion Hazardous Level In Jatipurno Sub-District Of Wonogiri District

Abstract

The use of agricultural land on steep slopes that is not in accordance with the rules of soil and water conservation causes Jatipurno Sub-District is vulnerable to erosion. The aim of this research was to analyze erosion hazardous level (TBE) and predict the actual erosion (A) at Jatipurno Sub-District and planning of soil conservation when the actual erosion is more than the threshold at Jatipurno District. The USLE (Universal Soil Loss Equation) was used to predict actual erosion and erosion hazardous level then planning of soil conservation. The result showed that actual erosion level was varied from very light to heavy. The very light erosion, in range 0.2 ton/ha/yr to 7.8 ton/ha/yr the areas is about 1,879.19 ha (43.5%). The light erosion is 51.96 ton/ha/yr the areas is about 788.40 ha (18.3%). The moderate erosion is 92.83 ton/ha/yr the areas is about 694.95 ha (16.1%). The heavy erosion in range 209.84 ton/ha/yr to 377.21 ton/ha/yr the areas is about 952.80 ha (22.1%). Erosion hazardous level was varied from very light to very heavy. The very light erosion hazardous level covered areas of 1,034.77 ha (23.98%), the light erosion hazardous level covered areas 1,443 ha (33.44%), the heavy erosion hazardous level covered areas 1,204 ha (27.91%), the very heavy erosion hazardous level covered areas 632.88 ha (14.67%). Actual erosion dominated by very light level and TBE by the light level. The Land Capability Classification (KKL) is used as the basis for recommending soil and water conservation. Soil conservation planning is carried out by vegetative and mechanical conservation measures, such as planting variations of cover crops and terraces built in accordance with slope land and soil depths, land management according to local environmental and cultural preservation regulations and cooperation of all parties in environmental management can be done to prevent and minimize erosion.

Assessing Soil Degradation Status under Different Types of Agricultural Land (Case Study: Jatisrono Sub-district, Wonogiri District, Indonesia)

“…Land that has a slope of >15%, according to Andrian et al( 2014), is more easily degraded. A large slope will affect the amount of runoff and flow volume Widiatiningsih et al(2018a), making soil erosionmore significant. This condition causes land with large slopes to risk soil degradation due to erosion (Hartati et al, 2018).…”

Journal of Water and Land Development

“…Therefore, a river sediment transport analysis is pivotal to optimise river management [RAFSANJANI 2017]. Soil conservation planning is carried out by vegetative conservation measures, such as planting variations of cover crops and terraces can be done to prevent and minimise erosion [HERAWATI et al 2018;WIDIATININGSIH et al 2018].…”