Hydrological studies for small watershed in India using the ANSWERS model

Singh, Ranjeet; Tiwari, K. N.; Mal, B. C.

doi:10.1016/j.jhydrol.2005.06.011

Cited by 53 publications

(29 citation statements)

References 15 publications

(15 reference statements)

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“…Soil and water loss is one of the global environmental problems that have long caused many concerns (Singha et al 2006;Gu et al 2013). Afforestation has been the most widespread policy for severely eroded areas in the world (Chirino et al 2001;Deng et al 2012).…”

Section: Introductionmentioning

confidence: 99%

N–P stoichiometry in soil and leaves of Pinus massoniana forest at different stand ages in the subtropical soil erosion area of China

Liu

Shao

et al. 2016

Environ Earth Sci

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Plant nitrogen (N)-phosphorus (P) stoichiometry is associated with important ecological processes. However, N-P stoichiometry in soil and plants and adaptive mechanisms of plants to infertile soils in the soil erosion areas remain unclear. We selected 15 plots with Masson pine forest of varying stand ages in typical subtropical soil erosion areas of Southern China. The total nitrogen (TN) and total phosphorus (TP) concentrations in green leaves of Masson pine forest (9.2 and 0.61 g/kg) were significantly lower than the national averages in China (18.6 and 1.21 g/ kg). The N:P ratio (TN:TP) of green leaves (15.1:1) was higher than the national (14.4:1) and the global levels (11.8:1 or 11.0:1). Forest soil TN, TP concentrations (0.41 and 0.14 g/kg) were lower than the national averages. The high N:P ratio of green leaves and low soil TP, AP concentrations indicated that P was important in limiting Masson pine forest growth, especially for forests with stand age less than 10 years. Leaf TN, TP resorption efficiencies of Masson pine forests were 26.5 and 64.9 %, and TP in senesced leaves of Masson pine with different stand ages was completely resorbed, suggesting that Masson pine was effective at adapting to nutrient-poor soils. Differences in leaf N-P stoichiometry among different stand ages indicated that nutrient demand varied with Masson pine forest growth stages. Changes in forest soil N-P stoichiometry suggested that Masson pine forest afforestation could greatly improve the soil quality in the eroded lands. However, the significant improvement would take at least a 30-year-long period.

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Section: Introductionmentioning

confidence: 99%

N–P stoichiometry in soil and leaves of Pinus massoniana forest at different stand ages in the subtropical soil erosion area of China

Liu

Shao

et al. 2016

Environ Earth Sci

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“…Soil erosion, defined as the detachment and displacement of soil particles from the surface to another location (Govers et al, 1990;Flanagan, 2002), continues to be a primary cause of soil degradation throughout the world (Fu and Gulinck, 1994), and has become an issue of significant and severe societal and environmental concern (Elsen et al, 2003;Singha et al, 2006). Land use/cover, as one of the most important factors, influences the occurrence and the intensity of runoff and sediment yield (Hovius, 1998;Karvonen et al, 1999;Chen et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

The effect of land uses and rainfall regimes on runoff and soil erosion in the semi-arid loess hilly area, China

Wei

Chen

et al. 2007

Journal of Hydrology

395

167

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SummaryThe main purpose of this article is to analyze runoff and soil loss in relation to land use and rainfall regimes in a loess hilly area of China. Based on 14 years of field measurements and K-means clustering, 131 rainfall events were classified into three rainfall regimes. Rainfall Regime II is an aggregation of rainfall events with such features as high intensity, short duration and high frequency. Regime I is the aggregation of rainfall events of medium intensity, medium duration and less frequent occurrence. Regime III is the aggregation of events of low intensity and long duration and infrequent occurrence. The following results were found. (1) Mean runoff coefficient and erosion modulus among the five land use types are: cropland > pastureland > woodland > grassland > shrubland. (2) The sensitivity of runoff and erosion to the rainfall regimes differ. Rainfall Regime II causes the greatest proportion of runoff and soil loss, followed by Regime I and Regime III. (3) The processes of runoff and soil loss, however, are complicated and uncertain with the interaction of rainfall and land use. This is mainly due to the different stages of vegetation succession. Based on these results, it was suggested that more attention should be paid to Rainfall Regime II since it had the most erosive effect. Shrubland is the first choice to control soil erosion when land use conversion is implemented, whereas pastureland (alfalfa) is not. Large-scale plantation of alfalfa therefore, should be avoided. Grassland and woodland can be used as important supplements to shrubland. ª

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“…Sediment loss by water is a serious environment problem that is threatening the sustainability of ecological system [1]. The Poyang Lake drainage area (covering 122,100 km 2 ) has contributed greatly to the socioeconomic development of China.…”

Section: Introductionmentioning

confidence: 99%

“…If the pattern of "source" and "sink" patches changes, the sediment yield observed at the outlet of the watershed should respond. Under this hypothesis, we applied the LCI to investigate the response of sediment yield to vegetation cover in the Poyang Lake drainage area, and addressed the following research questions: (1) What are the change characteristics of vegetation patterns related to topography in the study area? (2) How does the sediment yield respond to vegetation patterns changes?…”

Section: Introductionmentioning

confidence: 99%

Responses of Sediment Yield to Vegetation Cover Changes in the Poyang Lake Drainage Area, China

Xiao

Yang

Cai

2016

Water

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Abstract:Ascertaining the relationships between sediment transport processes and vegetation cover is essential for watershed soil and water conservation. However, it is not easy to realize this target on a large scale. In this study, the location-weighted landscape contrast index (LCI) based on the "source-sink" theory of ecological processes was introduced to unravel the response of sediment yield to vegetation cover changes in the Poyang Lake drainage area (the largest freshwater lake in China). A modified location-weighted landscape contrast index (mLCI) was proposed to improve the accuracy and efficiency of the LCI. The average vegetation fraction of the study area significantly increased from 46.2% in Period I (1992Period I ( -1994 to 76.5% in Period II (2004)(2005)(2006) and then slightly decreased to 73.2% in Period III (2011. From Period I to Period II, the area-specific sediment yield (ASY) sharply decreased by 55%. In Period II, the "source" vegetation patches were found further away from the water bodies, and were more likely to be located on gentler slopes than in Period I. From Period II to Period III, the ASY sharply increased by 83%. In Period III, "source" patches were found closer to the water bodies than in Period II, whereas the "sink" patches were found further away from the water bodies. The high statistical correlation between LCIs/mLCIs and ASY indicated a sensitive response of the sediment yield to vegetation cover changes that significantly altered the sediment transport processes in the study area. The ASY was better correlated with the mLCI than with the LCI. Three key harnessing sub-watersheds of the Ganjiang watershed were identified by calculating the mLCIs: Qingfengshan, Yuanhe, and Jinjiang. This study supported watershed ecological management in the Poyang Lake drainage area and provided a methodology reference for future sediment transport process studies.

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Hydrological studies for small watershed in India using the ANSWERS model

Cited by 53 publications

References 15 publications

N–P stoichiometry in soil and leaves of Pinus massoniana forest at different stand ages in the subtropical soil erosion area of China

N–P stoichiometry in soil and leaves of Pinus massoniana forest at different stand ages in the subtropical soil erosion area of China

The effect of land uses and rainfall regimes on runoff and soil erosion in the semi-arid loess hilly area, China

Responses of Sediment Yield to Vegetation Cover Changes in the Poyang Lake Drainage Area, China

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