Impact of land use changes and management practices on groundwater resources in Kolar district, Southern India

Garg, Kaushal K.; Anantha, K. H.; Nune, Rajesh; Akuraju, Venkata Radha; Singh, Pushpraj; Gumma, Murali Krishna; Dixit, Sreenath; Ragab, Ragab

doi:10.1016/j.ejrh.2020.100732

Cited by 20 publications

(19 citation statements)

References 76 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The declining groundwater table due to high extraction will also intensify water scarcity and lead to insufficient supply of freshwater in dry periods for the growing population in the urban areas [23]. In the face of climate change, declining groundwater levels, variable rainfall and irrigation will represent a challenge for Bangladesh and South Asia's food security [96,97].…”

Section: Plos Climatementioning

confidence: 99%

Long-term spatio-temporal variability and trends in rainfall and temperature extremes and their potential risk to rice production in Bangladesh

et al. 2022

View full text Add to dashboard Cite

Understanding the historical and future spatio-temporal changes in climate extremes and their potential risk to rice production is crucial for achieving food security in Bangladesh. This paper presents results from a study on trend analysis for 13 climate metrics that significantly influence rice production. The analysis was conducted using the non-parametric Mann-Kendall test and the Theil-Sen slope estimator methods. The study included data from all available weather stations in Bangladesh and the assessment was done for both the wet (May to October) and dry (November to April) seasons, which cover the growing seasons of the country’s three types of rice: Aus, Aman and Boro. Results show significant decreasing trends for wet season rainfall (>12 mm/season/year in some stations) in the central and north regions. In addition, dry season rainfall is decreasing significantly in many areas, whilst dry season dry spells are increasing throughout Bangladesh. Decrease in rainfall in some of these areas are of concern because of its impacts on rainfed Aus rice and in the sowing/planting of rainfed Aman rice and irrigated dry season Boro rice. The maximum temperatures in the wet season are increasing throughout the country at 0.5°C every ten years, significantly at most of the climate stations. The analysis shows that the number of days with temperature >36°C has significantly increased in 18 stations over the last three decades, which implies a serious risk to Aman rice yield. The current maximum temperatures (both in the wet and dry seasons) are higher than the optimum temperature ranges for rice production, and this will have likely adverse effects on yield in the face of climate change with increasing temperatures. The results herein have practical implications for planning appropriate adaptation policies to ensure food security in the country.

show abstract

Section: Plos Climatementioning

confidence: 99%

Long-term spatio-temporal variability and trends in rainfall and temperature extremes and their potential risk to rice production in Bangladesh

et al. 2022

View full text Add to dashboard Cite

show abstract

“…In the late 1990s, a new productivity enhancement approach was introduced along with livestock promotion to improve the productivity of small and marginal farms. This was crucial to address food security and crop intensification (Garg et al, 2020a).…”

Section: Introductionmentioning

confidence: 99%

Transforming livestock productivity through watershed interventions: A case study of Parasai-Sindh watershed in Bundelkhand region of Central India

Dev

Singh

Garg

et al. 2022

Agricultural Systems

Self Cite

View full text Add to dashboard Cite

“…There is limited scope to expand irrigable land with declined water resource availability (Mukherjee et al 2018;Ali et al 2019). Agriculture in the drylands is largely supported by groundwater resources (Garg et al 2020a(Garg et al , 2020b. Currently, India withdraws about 250 km 3 of freshwater annually from groundwater sources, which is the highest in the world (Gleeson et al 2016;Government of India 2019).…”

Section: Introductionmentioning

confidence: 99%

Impact of Rainwater Harvesting on Hydrological Processes in a Fragile Watershed of South Asia

et al. 2021

Self Cite

View full text Add to dashboard Cite

Agricultural water management (AWM) interventions play an important role in ensuring sustainable food production and mitigating climate risks. This study was carried out in a watershed located in a low rainfall (400-600 mm) region of western India. The Soil and Water Assessment Tool model was calibrated using surface runoff, soil loss, and reservoir storage levels, between the year 2000 and 2006. The investigation indicated that the various AWM interventions increased groundwater recharge from 30 mm/year to 80 mm/year and reduced surface runoff from 250 mm/year to 100 mm/year. The intervention structures were refilled two to three times during the monsoon season depending on rainfall intensity and duration. The interventions have the advantage of building a resilient system by enhancing groundwater availability even in dry years, stimulating crop intensification and protecting the landscape from severe erosion. The results indicate that soil erosion has been reduced by more than 75% compared to the nonintervention situation. Moreover, the AWM interventions led to the cultivation of 100-150 ha of fallow land with high-value crops (horticulture, vegetables, and fodder). Household income increased by several folds compared to the nonintervention situation. The study showed about 50% reduction in downstream water availability, which could be a major concern. However, there are a number of ecosystem trade-offs such as improved base flow to the stream and reduction in soil loss that should be considered. The study is of great importance to stakeholders to decide on the optimal design for AWM interventions to achieve sustainable development goals.

show abstract

Impact of land use changes and management practices on groundwater resources in Kolar district, Southern India

Cited by 20 publications

References 76 publications

Long-term spatio-temporal variability and trends in rainfall and temperature extremes and their potential risk to rice production in Bangladesh

Long-term spatio-temporal variability and trends in rainfall and temperature extremes and their potential risk to rice production in Bangladesh

Transforming livestock productivity through watershed interventions: A case study of Parasai-Sindh watershed in Bundelkhand region of Central India

Impact of Rainwater Harvesting on Hydrological Processes in a Fragile Watershed of South Asia

Contact Info

Product

Resources

About